starlight-0.37.4.tgz: 1 vulnerabilities (highest severity is: 6.1)

[mend-for-github-com]

Vulnerable Library - starlight-0.37.4.tgz

Path to dependency file: /docs/starlight-docs/package.json

Path to vulnerable library: /docs/package.json,/docs/starlight-docs/package.json

Found in HEAD commit: 85a64cace68e869559113ce87327c43bb32dd24a

Vulnerabilities

Vulnerability	Severity	CVSS	Dependency	Type	Fixed in (starlight version)	Remediation Possible**
CVE-2026-41305	Medium	6.1	postcss-8.5.6.tgz	Transitive	0.37.5	✅

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

Details

CVE-2026-41305

Vulnerable Library - postcss-8.5.6.tgz

Tool for transforming styles with JS plugins

Library home page: https://registry.npmjs.org/postcss/-/postcss-8.5.6.tgz

Path to dependency file: /docs/package.json

Path to vulnerable library: /docs/package.json,/docs/starlight-docs/package.json

Dependency Hierarchy:

• starlight-0.37.4.tgz (Root Library)
  • astro-expressive-code-0.41.6.tgz
    • rehype-expressive-code-0.41.6.tgz
      • expressive-code-0.41.6.tgz
        • core-0.41.6.tgz
          • ❌ postcss-8.5.6.tgz (Vulnerable Library)

Found in HEAD commit: 85a64cace68e869559113ce87327c43bb32dd24a

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 (@astrojs/starlight): 0.37.5

⛑️ Automatic Remediation will be attempted for this issue.

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⛑️Automatic Remediation will be attempted for this issue.