css-loader-6.5.1.tgz: 3 vulnerabilities (highest severity is: 6.1)

[mend-bolt-for-github]

Vulnerable Library - css-loader-6.5.1.tgz

Path to dependency file: /package.json

Path to vulnerable library: /node_modules/nanoid/package.json

Found in HEAD commit: e103b6386c0031666a1203e2e1dc93586e0cd828

Vulnerabilities

Vulnerability	Severity	CVSS	Dependency	Type	Fixed in (css-loader version)	Remediation Possible**
CVE-2026-41305	Medium	6.1	postcss-8.4.5.tgz	Transitive	6.7.0	❌
CVE-2023-44270	Medium	5.3	postcss-8.4.5.tgz	Transitive	6.6.0	❌
CVE-2024-55565	Medium	4.3	nanoid-3.2.0.tgz	Transitive	6.6.0	❌

**In some cases, Remediation PR cannot be created automatically for a vulnerability despite the availability of remediation

Details

CVE-2026-41305

Vulnerable Library - postcss-8.4.5.tgz

Tool for transforming styles with JS plugins

Library home page: https://registry.npmjs.org/postcss/-/postcss-8.4.5.tgz

Path to dependency file: /package.json

Path to vulnerable library: /node_modules/postcss/package.json

Dependency Hierarchy:

• css-loader-6.5.1.tgz (Root Library)
  • ❌ postcss-8.4.5.tgz (Vulnerable Library)

Found in HEAD commit: e103b6386c0031666a1203e2e1dc93586e0cd828

Found in base branch: main

Vulnerability Details

PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. Versions prior to 8.5.10 do not escape "</style>" sequences when stringifying CSS ASTs. When user-submitted CSS is parsed and re-stringified for embedding in HTML "<style>" tags, "</style>" in CSS values breaks out of the style context, enabling XSS. Version 8.5.10 fixes the issue.

Publish Date: 2026-04-24

URL: CVE-2026-41305

CVSS 3 Score Details (6.1)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Changed
• Impact Metrics:
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-qx2v-qp2m-jg93

Release Date: 2026-04-24

Fix Resolution (postcss): 8.5.10

Direct dependency fix Resolution (css-loader): 6.7.0

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CVE-2023-44270

Vulnerable Library - postcss-8.4.5.tgz

Tool for transforming styles with JS plugins

Library home page: https://registry.npmjs.org/postcss/-/postcss-8.4.5.tgz

Path to dependency file: /package.json

Path to vulnerable library: /node_modules/postcss/package.json

Dependency Hierarchy:

• css-loader-6.5.1.tgz (Root Library)
  • ❌ postcss-8.4.5.tgz (Vulnerable Library)

Found in HEAD commit: e103b6386c0031666a1203e2e1dc93586e0cd828

Found in base branch: main

Vulnerability Details

An issue was discovered in PostCSS before 8.4.31. The vulnerability affects linters using PostCSS to parse external untrusted CSS. An attacker can prepare CSS in such a way that it will contains parts parsed by PostCSS as a CSS comment. After processing by PostCSS, it will be included in the PostCSS output in CSS nodes (rules, properties) despite being included in a comment.

Publish Date: 2023-09-29

URL: CVE-2023-44270

CVSS 3 Score Details (5.3)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-7fh5-64p2-3v2j

Release Date: 2023-09-29

Fix Resolution (postcss): 8.4.31

Direct dependency fix Resolution (css-loader): 6.6.0

Step up your Open Source Security Game with Mend here

CVE-2024-55565

Vulnerable Library - nanoid-3.2.0.tgz

A tiny (130 bytes), secure URL-friendly unique string ID generator

Library home page: https://registry.npmjs.org/nanoid/-/nanoid-3.2.0.tgz

Path to dependency file: /package.json

Path to vulnerable library: /node_modules/nanoid/package.json

Dependency Hierarchy:

• css-loader-6.5.1.tgz (Root Library)
  • postcss-8.4.5.tgz
    • ❌ nanoid-3.2.0.tgz (Vulnerable Library)

Found in HEAD commit: e103b6386c0031666a1203e2e1dc93586e0cd828

Found in base branch: main

Vulnerability Details

nanoid (aka Nano ID) before 5.0.9 mishandles non-integer values. 3.3.8 is also a fixed version.

Publish Date: 2024-12-09

URL: CVE-2024-55565

CVSS 3 Score Details (4.3)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: Low
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://www.cve.org/CVERecord?id=CVE-2024-55565

Release Date: 2024-12-09

Fix Resolution (nanoid): 3.3.8

Direct dependency fix Resolution (css-loader): 6.6.0

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