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Vulnerability Details :

CVE-2024-58340

Summary
Assigner-VulnCheck
Assigner Org ID-83251b91-4cc7-4094-a5c7-464a1b83ea10
Published At-12 Jan, 2026 | 23:05
Updated At-13 Jan, 2026 | 16:21
Rejected At-
Credits

LangChain <= 0.3.1 MRKLOutputParser ReDoS

LangChain versions up to and including 0.3.1 contain a regular expression denial-of-service (ReDoS) vulnerability in the MRKLOutputParser.parse() method (libs/langchain/langchain/agents/mrkl/output_parser.py). The parser applies a backtracking-prone regular expression when extracting tool actions from model output. An attacker who can supply or influence the parsed text (for example via prompt injection in downstream applications that pass LLM output directly into MRKLOutputParser.parse()) can trigger excessive CPU consumption by providing a crafted payload, causing significant parsing delays and a denial-of-service condition.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
â–ĽCommon Vulnerabilities and Exposures (CVE)
cve.org
Assigner:VulnCheck
Assigner Org ID:83251b91-4cc7-4094-a5c7-464a1b83ea10
Published At:12 Jan, 2026 | 23:05
Updated At:13 Jan, 2026 | 16:21
Rejected At:
â–ĽCVE Numbering Authority (CNA)
LangChain <= 0.3.1 MRKLOutputParser ReDoS

LangChain versions up to and including 0.3.1 contain a regular expression denial-of-service (ReDoS) vulnerability in the MRKLOutputParser.parse() method (libs/langchain/langchain/agents/mrkl/output_parser.py). The parser applies a backtracking-prone regular expression when extracting tool actions from model output. An attacker who can supply or influence the parsed text (for example via prompt injection in downstream applications that pass LLM output directly into MRKLOutputParser.parse()) can trigger excessive CPU consumption by providing a crafted payload, causing significant parsing delays and a denial-of-service condition.

Affected Products
Vendor
LangChain AI
Product
LangChain
Repo
https://github.com/langchain-ai/langchain
Default Status
unknown
Versions
Affected
  • From 0 through 0.3.1 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-1333CWE-1333 Inefficient Regular Expression Complexity
Type: CWE
CWE ID: CWE-1333
Description: CWE-1333 Inefficient Regular Expression Complexity
Metrics
VersionBase scoreBase severityVector
4.08.7HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Version: 4.0
Base score: 8.7
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

finder
LifeTeam2024
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://huntr.com/bounties/e7ece02c-d4bb-4166-8e08-6baf4f8845bb
technical-description
exploit
https://www.langchain.com/
product
https://github.com/langchain-ai/langchain
product
https://www.vulncheck.com/advisories/langchain-mrkloutputparser-redos
third-party-advisory
Hyperlink: https://huntr.com/bounties/e7ece02c-d4bb-4166-8e08-6baf4f8845bb
Resource:
technical-description
exploit
Hyperlink: https://www.langchain.com/
Resource:
product
Hyperlink: https://github.com/langchain-ai/langchain
Resource:
product
Hyperlink: https://www.vulncheck.com/advisories/langchain-mrkloutputparser-redos
Resource:
third-party-advisory
â–ĽAuthorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
â–ĽNational Vulnerability Database (NVD)
nvd.nist.gov
Source:disclosure@vulncheck.com
Published At:12 Jan, 2026 | 23:15
Updated At:21 Jan, 2026 | 17:57

LangChain versions up to and including 0.3.1 contain a regular expression denial-of-service (ReDoS) vulnerability in the MRKLOutputParser.parse() method (libs/langchain/langchain/agents/mrkl/output_parser.py). The parser applies a backtracking-prone regular expression when extracting tool actions from model output. An attacker who can supply or influence the parsed text (for example via prompt injection in downstream applications that pass LLM output directly into MRKLOutputParser.parse()) can trigger excessive CPU consumption by providing a crafted payload, causing significant parsing delays and a denial-of-service condition.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.08.7HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: Secondary
Version: 4.0
Base score: 8.7
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Primary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CPE Matches

langchain
langchain
>>langchain>>Versions up to 0.3.1(inclusive)
cpe:2.3:a:langchain:langchain:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-1333Primarydisclosure@vulncheck.com
CWE ID: CWE-1333
Type: Primary
Source: disclosure@vulncheck.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/langchain-ai/langchaindisclosure@vulncheck.com
Product
https://huntr.com/bounties/e7ece02c-d4bb-4166-8e08-6baf4f8845bbdisclosure@vulncheck.com
Exploit
Issue Tracking
Third Party Advisory
https://www.langchain.com/disclosure@vulncheck.com
Product
https://www.vulncheck.com/advisories/langchain-mrkloutputparser-redosdisclosure@vulncheck.com
Third Party Advisory
Hyperlink: https://github.com/langchain-ai/langchain
Source: disclosure@vulncheck.com
Resource:
Product
Hyperlink: https://huntr.com/bounties/e7ece02c-d4bb-4166-8e08-6baf4f8845bb
Source: disclosure@vulncheck.com
Resource:
Exploit
Issue Tracking
Third Party Advisory
Hyperlink: https://www.langchain.com/
Source: disclosure@vulncheck.com
Resource:
Product
Hyperlink: https://www.vulncheck.com/advisories/langchain-mrkloutputparser-redos
Source: disclosure@vulncheck.com
Resource:
Third Party Advisory

Change History

0
Information is not available yet

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Assigner-MITRE Corporation
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Matching Score-4
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Matching Score-4
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EPSS-0.07% / 21.85%
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Vendor-embedchainn/a
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CWE ID-CWE-1333
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CVE-2024-21539
Matching Score-4
Assigner-Snyk
ShareView Details
Matching Score-4
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7 Day CHG~0.00%
Published-19 Nov, 2024 | 05:00
Updated-19 Nov, 2024 | 21:57
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Versions of the package @eslint/plugin-kit before 0.2.3 are vulnerable to Regular Expression Denial of Service (ReDoS) due to improper input sanitization. An attacker can increase the CPU usage and crash the program by exploiting this vulnerability.

Action-Not Available
Vendor-n/aeslint
Product-@eslint/plugin-kitrewrite
CWE ID-CWE-770
Allocation of Resources Without Limits or Throttling
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2025-27220
Matching Score-4
Assigner-MITRE Corporation
ShareView Details
Matching Score-4
Assigner-MITRE Corporation
CVSS Score-4||MEDIUM
EPSS-0.57% / 67.93%
||
7 Day CHG~0.00%
Published-03 Mar, 2025 | 00:00
Updated-03 Nov, 2025 | 22:18
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

In the CGI gem before 0.4.2 for Ruby, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the Util#escapeElement method.

Action-Not Available
Vendor-Ruby
Product-cgirubyCGI
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2024-21538
Matching Score-4
Assigner-Snyk
ShareView Details
Matching Score-4
Assigner-Snyk
CVSS Score-8.7||HIGH
EPSS-0.07% / 21.08%
||
7 Day CHG~0.00%
Published-08 Nov, 2024 | 05:00
Updated-20 May, 2025 | 15:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Versions of the package cross-spawn before 6.0.6, from 7.0.0 and before 7.0.5 are vulnerable to Regular Expression Denial of Service (ReDoS) due to improper input sanitization. An attacker can increase the CPU usage and crash the program by crafting a very large and well crafted string.

Action-Not Available
Vendor-n/across-spawn
Product-cross-spawnorg.webjars.npm:cross-spawncross-spawn
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-43805
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-7.5||HIGH
EPSS-0.12% / 30.80%
||
7 Day CHG~0.00%
Published-07 Dec, 2021 | 17:25
Updated-04 Aug, 2024 | 04:03
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
ReDos vulnerability on guest checkout email validation

Solidus is a free, open-source ecommerce platform built on Rails. Versions of Solidus prior to 3.1.4, 3.0.4, and 2.11.13 have a denial of service vulnerability that could be exploited during a guest checkout. The regular expression used to validate a guest order's email was subject to exponential backtracking through a fragment like `a.a.` Versions 3.1.4, 3.0.4, and 2.11.13 have been patched to use a different regular expression. The maintainers added a check for email addresses that are no longer valid that will print information about any affected orders that exist. If a prompt upgrade is not an option, a workaround is available. It is possible to edit the file `config/application.rb` manually (with code provided by the maintainers in the GitHub Security Advisory) to check email validity.

Action-Not Available
Vendor-nebulabsolidusio
Product-solidussolidus
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2026-23956
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-7.5||HIGH
EPSS-0.01% / 2.90%
||
7 Day CHG-0.03%
Published-22 Jan, 2026 | 01:23
Updated-26 Jan, 2026 | 15:04
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
seroval affected by Denial of Service via RegExp serialization

seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, overriding RegExp serialization with extremely large patterns can exhaust JavaScript runtime memory during deserialization. Additionally, overriding RegExp serialization with patterns that trigger catastrophic backtracking can lead to ReDoS (Regular Expression Denial of Service). This issue has been fixed in version 1.4.1.

Action-Not Available
Vendor-lxsmnsyc
Product-seroval
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-43306
Matching Score-4
Assigner-JFrog
ShareView Details
Matching Score-4
Assigner-JFrog
CVSS Score-5.9||MEDIUM
EPSS-0.84% / 74.37%
||
7 Day CHG~0.00%
Published-01 Jun, 2022 | 16:47
Updated-16 Sep, 2024 | 23:56
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Exponential ReDoS in jquery-validation

An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the jquery-validation npm package, when an attacker is able to supply arbitrary input to the url2 method

Action-Not Available
Vendor-jqueryvalidationjquery-validation
Product-jquery_validationjquery-validation
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-43838
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-5.3||MEDIUM
EPSS-0.33% / 55.79%
||
7 Day CHG~0.00%
Published-17 Dec, 2021 | 18:20
Updated-04 Aug, 2024 | 04:10
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Regular Expression Denial of Service (ReDoS) in jsx-slack

jsx-slack is a library for building JSON objects for Slack Block Kit surfaces from JSX. In versions prior to 4.5.1 users are vulnerable to a regular expression denial-of-service (ReDoS) attack. If attacker can put a lot of JSX elements into `<blockquote>` tag, an internal regular expression for escaping characters may consume an excessive amount of computing resources. jsx-slack v4.5.1 has patched to a regex for escaping blockquote characters. Users are advised to upgrade as soon as possible.

Action-Not Available
Vendor-jsx-slack_projectyhatt
Product-jsx-slackjsx-slack
CWE ID-CWE-400
Uncontrolled Resource Consumption
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2022-25918
Matching Score-4
Assigner-Snyk
ShareView Details
Matching Score-4
Assigner-Snyk
CVSS Score-5.3||MEDIUM
EPSS-0.22% / 44.07%
||
7 Day CHG~0.00%
Published-27 Oct, 2022 | 05:05
Updated-05 May, 2025 | 19:15
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Regular Expression Denial of Service (ReDoS)

The package shescape from 1.5.10 and before 1.6.1 are vulnerable to Regular Expression Denial of Service (ReDoS) via the escape function in index.js, due to the usage of insecure regex in the escapeArgBash function.

Action-Not Available
Vendor-shescape_projectn/a
Product-shescapeshescape
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2026-21868
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-7.5||HIGH
EPSS-0.06% / 18.75%
||
7 Day CHG~0.00%
Published-08 Jan, 2026 | 00:26
Updated-20 Jan, 2026 | 18:47
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Flag Forge has ReDoS Vulnerability in User Profile Lookup API

Flag Forge is a Capture The Flag (CTF) platform. Versions 2.3.2 and below have a Regular Expression Denial of Service (ReDoS) vulnerability in the user profile API endpoint (/api/user/[username]). The application constructs a regular expression dynamically using unescaped user input (the username parameter). An attacker can exploit this by sending a specially crafted username containing regex meta-characters (e.g., deeply nested groups or quantifiers), causing the MongoDB regex engine to consume excessive CPU resources. This can lead to Denial of Service for other users. The issue is fixed in version 2.3.3. To workaround this issue, implement a Web Application Firewall (WAF) rule to block requests containing regex meta-characters in the URL path.

Action-Not Available
Vendor-flagforgeFlagForgeCTF
Product-flagforgeflagForge
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2022-25887
Matching Score-4
Assigner-Snyk
ShareView Details
Matching Score-4
Assigner-Snyk
CVSS Score-5.3||MEDIUM
EPSS-0.42% / 61.66%
||
7 Day CHG~0.00%
Published-30 Aug, 2022 | 05:00
Updated-17 Sep, 2024 | 03:07
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Regular Expression Denial of Service (ReDoS)

The package sanitize-html before 2.7.1 are vulnerable to Regular Expression Denial of Service (ReDoS) due to insecure global regular expression replacement logic of HTML comment removal.

Action-Not Available
Vendor-apostrophecmsn/a
Product-sanitize-htmlsanitize-html
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2024-13926
Matching Score-4
Assigner-WPScan
ShareView Details
Matching Score-4
Assigner-WPScan
CVSS Score-7.5||HIGH
EPSS-0.40% / 60.07%
||
7 Day CHG+0.26%
Published-19 Apr, 2025 | 06:00
Updated-27 Aug, 2025 | 12:00
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
WP-Syntax <= 1.2 - Author+ Potential ReDoS

The WP-Syntax WordPress plugin through 1.2 does not properly handle input, allowing an attacker to create a post containing a large number of tags, thereby exploiting a catastrophic backtracking issue in the regular expression processing to cause a DoS.

Action-Not Available
Vendor-connections-proUnknown
Product-wp-syntaxWP-Syntax
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-43843
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-5.3||MEDIUM
EPSS-0.56% / 67.83%
||
7 Day CHG~0.00%
Published-20 Dec, 2021 | 21:15
Updated-04 Aug, 2024 | 04:10
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Insufficient patch for Regular Expression Denial of Service (ReDoS) to jsx-slack v4.5.1

jsx-slack is a package for building JSON objects for Slack block kit surfaces from JSX. The maintainers found the patch for CVE-2021-43838 in jsx-slack v4.5.1 is insufficient tfor protection from a Regular Expression Denial of Service (ReDoS) attack. If an attacker can put a lot of JSX elements into `<blockquote>` tag _with including multibyte characters_, an internal regular expression for escaping characters may consume an excessive amount of computing resources. v4.5.1 passes the test against ASCII characters but misses the case of multibyte characters. jsx-slack v4.5.2 has updated regular expressions for escaping blockquote characters to prevent catastrophic backtracking. It is also including an updated test case to confirm rendering multiple tags in `<blockquote>` with multibyte characters.

Action-Not Available
Vendor-jsx-slack_projectyhatt
Product-jsx-slackjsx-slack
CWE ID-CWE-400
Uncontrolled Resource Consumption
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-43308
Matching Score-4
Assigner-JFrog
ShareView Details
Matching Score-4
Assigner-JFrog
CVSS Score-5.9||MEDIUM
EPSS-0.28% / 50.77%
||
7 Day CHG~0.00%
Published-01 Jun, 2022 | 16:47
Updated-16 Sep, 2024 | 17:28
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Exponential ReDoS in markdown-link-extractor

An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the markdown-link-extractor npm package, when an attacker is able to supply arbitrary input to the module's exported function

Action-Not Available
Vendor-markdown-link-extractor_projectmarkdown-link-extractor
Product-markdown-link-extractormarkdown-link-extractor
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-4306
Matching Score-4
Assigner-VulDB
ShareView Details
Matching Score-4
Assigner-VulDB
CVSS Score-3.5||LOW
EPSS-0.49% / 65.09%
||
7 Day CHG~0.00%
Published-07 Jan, 2023 | 16:29
Updated-03 Aug, 2024 | 17:23
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
cronvel terminal-kit redos

A vulnerability classified as problematic has been found in cronvel terminal-kit up to 2.1.7. Affected is an unknown function. The manipulation leads to inefficient regular expression complexity. Upgrading to version 2.1.8 is able to address this issue. The name of the patch is a2e446cc3927b559d0281683feb9b821e83b758c. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-217620.

Action-Not Available
Vendor-terminal-kit_projectcronvel
Product-terminal-kitterminal-kit
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2024-12720
Matching Score-4
Assigner-Protect AI (formerly huntr.dev)
ShareView Details
Matching Score-4
Assigner-Protect AI (formerly huntr.dev)
CVSS Score-5.3||MEDIUM
EPSS-0.14% / 33.58%
||
7 Day CHG+0.01%
Published-20 Mar, 2025 | 10:11
Updated-01 Aug, 2025 | 21:11
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Regular Expression Denial of Service (ReDoS) in huggingface/transformers

A Regular Expression Denial of Service (ReDoS) vulnerability was identified in the huggingface/transformers library, specifically in the file tokenization_nougat_fast.py. The vulnerability occurs in the post_process_single() function, where a regular expression processes specially crafted input. The issue stems from the regex exhibiting exponential time complexity under certain conditions, leading to excessive backtracking. This can result in significantly high CPU usage and potential application downtime, effectively creating a Denial of Service (DoS) scenario. The affected version is v4.46.3 (latest).

Action-Not Available
Vendor-huggingfacehuggingface
Product-transformershuggingface/transformers
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2019-25102
Matching Score-4
Assigner-VulDB
ShareView Details
Matching Score-4
Assigner-VulDB
CVSS Score-4.3||MEDIUM
EPSS-0.24% / 46.99%
||
7 Day CHG+0.13%
Published-12 Feb, 2023 | 13:31
Updated-05 Aug, 2024 | 03:00
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
simple-markdown simple-markdown.js redos

A vulnerability, which was classified as problematic, was found in simple-markdown 0.6.0. Affected is an unknown function of the file simple-markdown.js. The manipulation with the input <<<<<<<<<<:/:/:/:/:/:/:/:/:/:/ leads to inefficient regular expression complexity. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 0.6.1 is able to address this issue. The patch is identified as 015a719bf5cdc561feea05500ecb3274ef609cd2. It is recommended to upgrade the affected component. VDB-220638 is the identifier assigned to this vulnerability.

Action-Not Available
Vendor-khanacademyn/a
Product-simple-markdownsimple-markdown
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-4299
Matching Score-4
Assigner-VulDB
ShareView Details
Matching Score-4
Assigner-VulDB
CVSS Score-4.3||MEDIUM
EPSS-0.49% / 65.09%
||
7 Day CHG~0.00%
Published-02 Jan, 2023 | 07:57
Updated-03 Aug, 2024 | 17:23
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
cronvel string-kit naturalSort.js naturalSort redos

A vulnerability classified as problematic was found in cronvel string-kit up to 0.12.7. This vulnerability affects the function naturalSort of the file lib/naturalSort.js. The manipulation leads to inefficient regular expression complexity. The attack can be initiated remotely. Upgrading to version 0.12.8 is able to address this issue. The name of the patch is 9cac4c298ee92c1695b0695951f1488884a7ca73. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-217180.

Action-Not Available
Vendor-string_kit_projectcronvel
Product-string_kitstring-kit
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-4305
Matching Score-4
Assigner-VulDB
ShareView Details
Matching Score-4
Assigner-VulDB
CVSS Score-3.5||LOW
EPSS-0.49% / 65.09%
||
7 Day CHG~0.00%
Published-05 Jan, 2023 | 10:03
Updated-25 Nov, 2024 | 17:49
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Woorank robots-txt-guard patterns.js makePathPattern redos

A vulnerability was found in Woorank robots-txt-guard. It has been rated as problematic. Affected by this issue is the function makePathPattern of the file lib/patterns.js. The manipulation of the argument pattern leads to inefficient regular expression complexity. The exploit has been disclosed to the public and may be used. The name of the patch is c03827cd2f9933619c23894ce7c98401ea824020. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-217448.

Action-Not Available
Vendor-bridgelineWoorank
Product-robots-txt-guardrobots-txt-guard
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2022-23517
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-7.5||HIGH
EPSS-0.28% / 51.06%
||
7 Day CHG~0.00%
Published-14 Dec, 2022 | 16:10
Updated-03 Nov, 2025 | 22:15
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Inefficient Regular Expression Complexity in rails-html-sanitizer

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Certain configurations of rails-html-sanitizer < 1.4.4 use an inefficient regular expression that is susceptible to excessive backtracking when attempting to sanitize certain SVG attributes. This may lead to a denial of service through CPU resource consumption. This issue has been patched in version 1.4.4.

Action-Not Available
Vendor-Debian GNU/LinuxRuby on Rails
Product-debian_linuxrails_html_sanitizersrails-html-sanitizer
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-40660
Matching Score-4
Assigner-MITRE Corporation
ShareView Details
Matching Score-4
Assigner-MITRE Corporation
CVSS Score-7.5||HIGH
EPSS-0.28% / 50.94%
||
7 Day CHG~0.00%
Published-14 Jun, 2022 | 13:16
Updated-04 Aug, 2024 | 02:51
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

An issue was discovered in Delight Nashorn Sandbox 0.2.0. There is an ReDoS vulnerability that can be exploited to launching a denial of service (DoS) attack.

Action-Not Available
Vendor-javadelightn/a
Product-nashorn_sandboxn/a
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2022-23514
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-7.5||HIGH
EPSS-0.29% / 52.17%
||
7 Day CHG~0.00%
Published-14 Dec, 2022 | 13:19
Updated-03 Nov, 2025 | 22:15
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Inefficient Regular Expression Complexity in Loofah

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah < 2.19.1 contains an inefficient regular expression that is susceptible to excessive backtracking when attempting to sanitize certain SVG attributes. This may lead to a denial of service through CPU resource consumption. This issue is patched in version 2.19.1.

Action-Not Available
Vendor-loofah_projectflavorjones
Product-loofahloofah
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-40899
Matching Score-4
Assigner-MITRE Corporation
ShareView Details
Matching Score-4
Assigner-MITRE Corporation
CVSS Score-7.5||HIGH
EPSS-0.33% / 55.79%
||
7 Day CHG~0.00%
Published-27 Jun, 2022 | 10:58
Updated-04 Aug, 2024 | 02:51
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in repo-git-downloader v0.1.1 when downloading crafted invalid git repositories.

Action-Not Available
Vendor-repo-git-downloader_projectn/a
Product-repo-git-downloadern/a
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2019-25103
Matching Score-4
Assigner-VulDB
ShareView Details
Matching Score-4
Assigner-VulDB
CVSS Score-4.3||MEDIUM
EPSS-0.48% / 64.65%
||
7 Day CHG+0.42%
Published-12 Feb, 2023 | 14:31
Updated-05 Aug, 2024 | 03:00
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
simple-markdown simple-markdown.js redos

A vulnerability has been found in simple-markdown 0.5.1 and classified as problematic. Affected by this vulnerability is an unknown functionality of the file simple-markdown.js. The manipulation leads to inefficient regular expression complexity. The attack can be launched remotely. Upgrading to version 0.5.2 is able to address this issue. The patch is named 89797fef9abb4cab2fb76a335968266a92588816. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-220639.

Action-Not Available
Vendor-khanacademyn/a
Product-simple-markdownsimple-markdown
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-40892
Matching Score-4
Assigner-MITRE Corporation
ShareView Details
Matching Score-4
Assigner-MITRE Corporation
CVSS Score-7.5||HIGH
EPSS-0.33% / 55.79%
||
7 Day CHG~0.00%
Published-24 Jun, 2022 | 13:29
Updated-04 Aug, 2024 | 02:51
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in validate-color v2.1.0 when handling crafted invalid rgb(a) strings.

Action-Not Available
Vendor-validate_color_projectn/a
Product-validate_colorn/a
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-40895
Matching Score-4
Assigner-MITRE Corporation
ShareView Details
Matching Score-4
Assigner-MITRE Corporation
CVSS Score-7.5||HIGH
EPSS-0.33% / 55.79%
||
7 Day CHG~0.00%
Published-27 Jun, 2022 | 09:36
Updated-04 Aug, 2024 | 02:51
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in todo-regex v0.1.1 when matching crafted invalid TODO statements.

Action-Not Available
Vendor-todo-regex_projectn/a
Product-todo-regexn/a
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-40893
Matching Score-4
Assigner-MITRE Corporation
ShareView Details
Matching Score-4
Assigner-MITRE Corporation
CVSS Score-7.5||HIGH
EPSS-0.33% / 55.79%
||
7 Day CHG~0.00%
Published-24 Jun, 2022 | 16:12
Updated-04 Aug, 2024 | 02:51
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in validate-data v0.1.1 when validating crafted invalid emails.

Action-Not Available
Vendor-validate_data_projectn/a
Product-validate_datan/a
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2025-2099
Matching Score-4
Assigner-Protect AI (formerly huntr.dev)
ShareView Details
Matching Score-4
Assigner-Protect AI (formerly huntr.dev)
CVSS Score-5.3||MEDIUM
EPSS-0.03% / 9.21%
||
7 Day CHG-0.10%
Published-19 May, 2025 | 11:22
Updated-21 May, 2025 | 17:43
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Regular Expression Denial of Service (ReDoS) in huggingface/transformers

A vulnerability in the `preprocess_string()` function of the `transformers.testing_utils` module in huggingface/transformers version v4.48.3 allows for a Regular Expression Denial of Service (ReDoS) attack. The regular expression used to process code blocks in docstrings contains nested quantifiers, leading to exponential backtracking when processing input with a large number of newline characters. An attacker can exploit this by providing a specially crafted payload, causing high CPU usage and potential application downtime, effectively resulting in a Denial of Service (DoS) scenario.

Action-Not Available
Vendor-huggingfacehuggingface
Product-transformershuggingface/transformers
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-3803
Matching Score-4
Assigner-Protect AI (formerly huntr.dev)
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Matching Score-4
Assigner-Protect AI (formerly huntr.dev)
CVSS Score-7.5||HIGH
EPSS-0.13% / 32.98%
||
7 Day CHG~0.00%
Published-17 Sep, 2021 | 00:00
Updated-03 Aug, 2024 | 17:09
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Inefficient Regular Expression Complexity in fb55/nth-check

nth-check is vulnerable to Inefficient Regular Expression Complexity

Action-Not Available
Vendor-nth-check_projectfb55Debian GNU/Linux
Product-debian_linuxnth-checkfb55/nth-check
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-3842
Matching Score-4
Assigner-Protect AI (formerly huntr.dev)
ShareView Details
Matching Score-4
Assigner-Protect AI (formerly huntr.dev)
CVSS Score-7.5||HIGH
EPSS-0.41% / 60.86%
||
7 Day CHG~0.00%
Published-04 Jan, 2022 | 14:50
Updated-03 Aug, 2024 | 17:09
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Inefficient Regular Expression Complexity in nltk/nltk

nltk is vulnerable to Inefficient Regular Expression Complexity

Action-Not Available
Vendor-nltknltkDebian GNU/LinuxFedora Project
Product-fedoradebian_linuxnltknltk/nltk
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-3820
Matching Score-4
Assigner-Protect AI (formerly huntr.dev)
ShareView Details
Matching Score-4
Assigner-Protect AI (formerly huntr.dev)
CVSS Score-5.3||MEDIUM
EPSS-0.28% / 50.94%
||
7 Day CHG~0.00%
Published-27 Sep, 2021 | 12:25
Updated-03 Aug, 2024 | 17:09
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Inefficient Regular Expression Complexity in pksunkara/inflect

inflect is vulnerable to Inefficient Regular Expression Complexity

Action-Not Available
Vendor-inflect_projectpksunkara
Product-inflectpksunkara/inflect
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
CVE-2021-3810
Matching Score-4
Assigner-Protect AI (formerly huntr.dev)
ShareView Details
Matching Score-4
Assigner-Protect AI (formerly huntr.dev)
CVSS Score-7.5||HIGH
EPSS-0.25% / 47.74%
||
7 Day CHG~0.00%
Published-17 Sep, 2021 | 06:15
Updated-03 Aug, 2024 | 17:09
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Inefficient Regular Expression Complexity in cdr/code-server

code-server is vulnerable to Inefficient Regular Expression Complexity

Action-Not Available
Vendor-codercdr
Product-code-servercdr/code-server
CWE ID-CWE-1333
Inefficient Regular Expression Complexity
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