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Vulnerability Details :

CVE-2025-55164

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-12 Aug, 2025 | 16:02
Updated At-20 Aug, 2025 | 19:39
Rejected At-
Credits

content-security-policy-parser Prototype Pollution Vulnerability May Lead to RCE

content-security-policy-parser parses content security policy directives. A prototype pollution vulnerability exists in versions 0.5.0 and earlier, wherein if a policy name is called __proto__, one can override the Object prototype. This issue has been patched in version 0.6.0. A workaround involves disabling prototype method in NodeJS, neutralizing all possible prototype pollution attacks. Provide either --disable-proto=delete (recommended) or --disable-proto=throw as an argument to node to enable this feature.

Vendors
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Not available
Products
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Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
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N/A
No data available for selected date range
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Latest Percentile
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N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:12 Aug, 2025 | 16:02
Updated At:20 Aug, 2025 | 19:39
Rejected At:
▼CVE Numbering Authority (CNA)
content-security-policy-parser Prototype Pollution Vulnerability May Lead to RCE

content-security-policy-parser parses content security policy directives. A prototype pollution vulnerability exists in versions 0.5.0 and earlier, wherein if a policy name is called __proto__, one can override the Object prototype. This issue has been patched in version 0.6.0. A workaround involves disabling prototype method in NodeJS, neutralizing all possible prototype pollution attacks. Provide either --disable-proto=delete (recommended) or --disable-proto=throw as an argument to node to enable this feature.

Affected Products
Vendor
helmetjs
Product
content-security-policy-parser
Versions
Affected
  • < 0.6.0
Problem Types
TypeCWE IDDescription
CWECWE-1321CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Type: CWE
CWE ID: CWE-1321
Description: CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Metrics
VersionBase scoreBase severityVector
4.08.8HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Version: 4.0
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/helmetjs/content-security-policy-parser/security/advisories/GHSA-w2cq-g8g3-gm83
x_refsource_CONFIRM
https://github.com/helmetjs/content-security-policy-parser/issues/11
x_refsource_MISC
https://github.com/helmetjs/content-security-policy-parser/commit/b13a52554f0168af393e3e38ed4a94e9e6aea9dc
x_refsource_MISC
Hyperlink: https://github.com/helmetjs/content-security-policy-parser/security/advisories/GHSA-w2cq-g8g3-gm83
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/helmetjs/content-security-policy-parser/issues/11
Resource:
x_refsource_MISC
Hyperlink: https://github.com/helmetjs/content-security-policy-parser/commit/b13a52554f0168af393e3e38ed4a94e9e6aea9dc
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
1. 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
2. CVE Program Container
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
https://www.vicarius.io/vsociety/posts/cve-2025-55164-detect-node-csp-parser-vulnerability
N/A
https://www.vicarius.io/vsociety/posts/cve-2025-55164-mitigate-csp-parser-vulnerability
N/A
Hyperlink: https://www.vicarius.io/vsociety/posts/cve-2025-55164-detect-node-csp-parser-vulnerability
Resource: N/A
Hyperlink: https://www.vicarius.io/vsociety/posts/cve-2025-55164-mitigate-csp-parser-vulnerability
Resource: N/A
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:12 Aug, 2025 | 16:15
Updated At:20 Aug, 2025 | 20:15

content-security-policy-parser parses content security policy directives. A prototype pollution vulnerability exists in versions 0.5.0 and earlier, wherein if a policy name is called __proto__, one can override the Object prototype. This issue has been patched in version 0.6.0. A workaround involves disabling prototype method in NodeJS, neutralizing all possible prototype pollution attacks. Provide either --disable-proto=delete (recommended) or --disable-proto=throw as an argument to node to enable this feature.

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
Secondary4.08.8HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/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: Secondary
Version: 4.0
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/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
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-1321Secondarysecurity-advisories@github.com
CWE ID: CWE-1321
Type: Secondary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/helmetjs/content-security-policy-parser/commit/b13a52554f0168af393e3e38ed4a94e9e6aea9dcsecurity-advisories@github.com
N/A
https://github.com/helmetjs/content-security-policy-parser/issues/11security-advisories@github.com
N/A
https://github.com/helmetjs/content-security-policy-parser/security/advisories/GHSA-w2cq-g8g3-gm83security-advisories@github.com
N/A
https://www.vicarius.io/vsociety/posts/cve-2025-55164-detect-node-csp-parser-vulnerabilityaf854a3a-2127-422b-91ae-364da2661108
N/A
https://www.vicarius.io/vsociety/posts/cve-2025-55164-mitigate-csp-parser-vulnerabilityaf854a3a-2127-422b-91ae-364da2661108
N/A
Hyperlink: https://github.com/helmetjs/content-security-policy-parser/commit/b13a52554f0168af393e3e38ed4a94e9e6aea9dc
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/helmetjs/content-security-policy-parser/issues/11
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/helmetjs/content-security-policy-parser/security/advisories/GHSA-w2cq-g8g3-gm83
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://www.vicarius.io/vsociety/posts/cve-2025-55164-detect-node-csp-parser-vulnerability
Source: af854a3a-2127-422b-91ae-364da2661108
Resource: N/A
Hyperlink: https://www.vicarius.io/vsociety/posts/cve-2025-55164-mitigate-csp-parser-vulnerability
Source: af854a3a-2127-422b-91ae-364da2661108
Resource: N/A

Change History

0
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