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Vulnerability Details :

CVE-2025-47908

Summary
Assigner-Go
Assigner Org ID-1bb62c36-49e3-4200-9d77-64a1400537cc
Published At-06 Aug, 2025 | 20:41
Updated At-07 Aug, 2025 | 13:47
Rejected At-
Credits

Denial of service via malicious preflight requests in github.com/rs/cors

Middleware causes a prohibitive amount of heap allocations when processing malicious preflight requests that include a Access-Control-Request-Headers (ACRH) header whose value contains many commas. This behavior can be abused by attackers to produce undue load on the middleware/server as an attempt to cause a denial of service.

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:Go
Assigner Org ID:1bb62c36-49e3-4200-9d77-64a1400537cc
Published At:06 Aug, 2025 | 20:41
Updated At:07 Aug, 2025 | 13:47
Rejected At:
▼CVE Numbering Authority (CNA)
Denial of service via malicious preflight requests in github.com/rs/cors

Middleware causes a prohibitive amount of heap allocations when processing malicious preflight requests that include a Access-Control-Request-Headers (ACRH) header whose value contains many commas. This behavior can be abused by attackers to produce undue load on the middleware/server as an attempt to cause a denial of service.

Affected Products
Vendor
github.com/rs/cors
Product
github.com/rs/cors
Collection URL
https://pkg.go.dev
Package Name
github.com/rs/cors
Program Routines
  • Cors.handlePreflight
  • Cors.areHeadersAllowed
  • New
  • splitHeaderValues
  • AllowAll
  • Cors.HandlerFunc
  • Cors.ServeHTTP
  • Default
Default Status
unaffected
Versions
Affected
  • From 1.9.0 before 1.11.0 (semver)
Problem Types
TypeCWE IDDescription
N/AN/ACWE-1325: Improperly Controlled Sequential Memory Allocation
Type: N/A
CWE ID: N/A
Description: CWE-1325: Improperly Controlled Sequential Memory Allocation
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

@jub0bs
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/rs/cors/pull/171
N/A
https://github.com/rs/cors/issues/170
N/A
https://pkg.go.dev/vuln/GO-2024-2883
N/A
Hyperlink: https://github.com/rs/cors/pull/171
Resource: N/A
Hyperlink: https://github.com/rs/cors/issues/170
Resource: N/A
Hyperlink: https://pkg.go.dev/vuln/GO-2024-2883
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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
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:security@golang.org
Published At:06 Aug, 2025 | 21:15
Updated At:07 Aug, 2025 | 21:26

Middleware causes a prohibitive amount of heap allocations when processing malicious preflight requests that include a Access-Control-Request-Headers (ACRH) header whose value contains many commas. This behavior can be abused by attackers to produce undue load on the middleware/server as an attempt to cause a denial of service.

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
Secondary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: Secondary
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

Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/rs/cors/issues/170security@golang.org
N/A
https://github.com/rs/cors/pull/171security@golang.org
N/A
https://pkg.go.dev/vuln/GO-2024-2883security@golang.org
N/A
Hyperlink: https://github.com/rs/cors/issues/170
Source: security@golang.org
Resource: N/A
Hyperlink: https://github.com/rs/cors/pull/171
Source: security@golang.org
Resource: N/A
Hyperlink: https://pkg.go.dev/vuln/GO-2024-2883
Source: security@golang.org
Resource: N/A

Change History

0
Information is not available yet

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