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Vulnerability Details :

CVE-2026-45822

Summary
Assigner-seal
Assigner Org ID-22e2d327-25fe-45d7-9f0c-dcd23b7108df
Published At-30 Jun, 2026 | 08:05
Updated At-30 Jun, 2026 | 12:49
Rejected At-
Credits

decode-uri-component through 0.4.1 is vulnerable to denial of service. The decode() function splits input on '%' producing N tokens and calls decodeComponents(), exhibiting super-linear parsing time: 200 '%ab' tokens takes approximately 0.7s, 700 tokens approximately 6s, and 1400 tokens approximately 33s. An attacker can cause significant CPU consumption and event-loop blocking via crafted input.

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)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:seal
Assigner Org ID:22e2d327-25fe-45d7-9f0c-dcd23b7108df
Published At:30 Jun, 2026 | 08:05
Updated At:30 Jun, 2026 | 12:49
Rejected At:
▼CVE Numbering Authority (CNA)

decode-uri-component through 0.4.1 is vulnerable to denial of service. The decode() function splits input on '%' producing N tokens and calls decodeComponents(), exhibiting super-linear parsing time: 200 '%ab' tokens takes approximately 0.7s, 700 tokens approximately 6s, and 1400 tokens approximately 33s. An attacker can cause significant CPU consumption and event-loop blocking via crafted input.

Affected Products
Vendor
SamVerschueren
Product
decode-uri-component
Platforms
  • Linux
  • macOS
  • Windows
Default Status
unaffected
Versions
Affected
  • From 0.1.0 before 0.5.0 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-400CWE-400 Uncontrolled Resource Consumption
CWECWE-407CWE-407 Inefficient Algorithmic Complexity
Type: CWE
CWE ID: CWE-400
Description: CWE-400 Uncontrolled Resource Consumption
Type: CWE
CWE ID: CWE-407
Description: CWE-407 Inefficient Algorithmic Complexity
Metrics
VersionBase scoreBase severityVector
4.06.6MEDIUM
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:U/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
Version: 4.0
Base score: 6.6
Base severity: MEDIUM
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:U/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-469CAPEC-469 HTTP DoS
CAPEC ID: CAPEC-469
Description: CAPEC-469 HTTP DoS
Solutions

Configurations

Workarounds

Exploits

Credits

finder
Seal Security
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/SamVerschueren/decode-uri-component/blob/00662938dc7c6241547ae8abce7785cc13ffd3f6/index.js
N/A
https://github.com/SamVerschueren/decode-uri-component/commit/fa479dafeede7bedf04e5c89aa78f2a78c664005
N/A
https://www.npmjs.com/package/decode-uri-component
N/A
Hyperlink: https://github.com/SamVerschueren/decode-uri-component/blob/00662938dc7c6241547ae8abce7785cc13ffd3f6/index.js
Resource: N/A
Hyperlink: https://github.com/SamVerschueren/decode-uri-component/commit/fa479dafeede7bedf04e5c89aa78f2a78c664005
Resource: N/A
Hyperlink: https://www.npmjs.com/package/decode-uri-component
Resource: N/A
▼Authorized 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
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:22e2d327-25fe-45d7-9f0c-dcd23b7108df
Published At:30 Jun, 2026 | 09:16
Updated At:30 Jun, 2026 | 14:33

decode-uri-component through 0.4.1 is vulnerable to denial of service. The decode() function splits input on '%' producing N tokens and calls decodeComponents(), exhibiting super-linear parsing time: 200 '%ab' tokens takes approximately 0.7s, 700 tokens approximately 6s, and 1400 tokens approximately 33s. An attacker can cause significant CPU consumption and event-loop blocking via crafted input.

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
Secondary4.06.6MEDIUM
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:U/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:N/AU:Y/R:U/V:D/RE:M/U:Amber
N/A
Type: Secondary
Version: 4.0
Base score: 6.6
Base severity: MEDIUM
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:U/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:N/AU:Y/R:U/V:D/RE:M/U:Amber
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-400Secondary22e2d327-25fe-45d7-9f0c-dcd23b7108df
CWE-407Secondary22e2d327-25fe-45d7-9f0c-dcd23b7108df
CWE ID: CWE-400
Type: Secondary
Source: 22e2d327-25fe-45d7-9f0c-dcd23b7108df
CWE ID: CWE-407
Type: Secondary
Source: 22e2d327-25fe-45d7-9f0c-dcd23b7108df
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/SamVerschueren/decode-uri-component/blob/00662938dc7c6241547ae8abce7785cc13ffd3f6/index.js22e2d327-25fe-45d7-9f0c-dcd23b7108df
N/A
https://github.com/SamVerschueren/decode-uri-component/commit/fa479dafeede7bedf04e5c89aa78f2a78c66400522e2d327-25fe-45d7-9f0c-dcd23b7108df
N/A
https://www.npmjs.com/package/decode-uri-component22e2d327-25fe-45d7-9f0c-dcd23b7108df
N/A
Hyperlink: https://github.com/SamVerschueren/decode-uri-component/blob/00662938dc7c6241547ae8abce7785cc13ffd3f6/index.js
Source: 22e2d327-25fe-45d7-9f0c-dcd23b7108df
Resource: N/A
Hyperlink: https://github.com/SamVerschueren/decode-uri-component/commit/fa479dafeede7bedf04e5c89aa78f2a78c664005
Source: 22e2d327-25fe-45d7-9f0c-dcd23b7108df
Resource: N/A
Hyperlink: https://www.npmjs.com/package/decode-uri-component
Source: 22e2d327-25fe-45d7-9f0c-dcd23b7108df
Resource: N/A

Change History

0
Information is not available yet

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