astro-6.4.8.tgz: 2 vulnerabilities (highest severity is: 6.1)

[mend-for-github-com]

Vulnerable Library - astro-6.4.8.tgz

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

Library home page: https://registry.npmjs.org/astro/-/astro-6.4.8.tgz

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

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

Found in HEAD commit: 85a64cace68e869559113ce87327c43bb32dd24a

Vulnerabilities

Vulnerability	Severity	CVSS	Dependency	Type	Fixed in (astro version)	Remediation Possible**
CVE-2026-59729	Medium	6.1	astro-6.4.8.tgz	Direct	7.0.5	✅
CVE-2026-59727	Medium	6.1	astro-6.4.8.tgz	Direct	https://github.com/withastro/astro.git - astro@7.0.4	✅

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

Details

CVE-2026-59729

Vulnerable Library - astro-6.4.8.tgz

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

Library home page: https://registry.npmjs.org/astro/-/astro-6.4.8.tgz

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

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

Dependency Hierarchy:

• ❌ astro-6.4.8.tgz (Vulnerable Library)

Found in HEAD commit: 85a64cace68e869559113ce87327c43bb32dd24a

Found in base branch: main

Vulnerability Details

Astro is a web framework for content-driven websites. Versions prior to 7.0.6 are vulnerable to XSS through unescaped spread attribute names in renderHTMLElement. The fix for CVE-2026-54298 (GHSA-jrpj-wcv7-9fh9) added an INVALID_ATTR_NAME_CHAR guard to addAttribute() so that spread-prop attribute names containing "' >/= or whitespace are dropped. A second attribute-rendering path, renderHTMLElement() in packages/astro/src/runtime/server/render/dom.ts, has its own inline attribute loop that does not go through addAttribute() and was not updated. It interpolates the attribute name unescaped and only escapes the value, so untrusted prop keys spread onto a native-HTMLElement-subclass component can still break out of the attribute context. This issue has been fixed in version 7.0.6.

Publish Date: 2026-07-27

URL: CVE-2026-59729

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

Release Date: 2026-07-21

Fix Resolution: 7.0.5

⛑️ Automatic Remediation will be attempted for this issue.

CVE-2026-59727

Vulnerable Library - astro-6.4.8.tgz

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

Library home page: https://registry.npmjs.org/astro/-/astro-6.4.8.tgz

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

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

Dependency Hierarchy:

• ❌ astro-6.4.8.tgz (Vulnerable Library)

Found in HEAD commit: 85a64cace68e869559113ce87327c43bb32dd24a

Found in base branch: main

Vulnerability Details

Astro is a web framework for content-driven websites. In versions 3.10.0 through 7.0.3, when a transition:persist, transition:scope, or transition:persist-props directive is applied to a client-hydrated (client:*) component, Astro copied the directive value onto the rendered element without HTML-escaping it. If a developer reflects attacker-controlled input into one of these directives, an attacker can break out of the attribute and inject arbitrary HTML/JavaScript into the server-rendered output, resulting in reflected cross-site scripting (XSS). Exploitation requires the application developer to have written a non-idiomatic pattern — passing untrusted, request-derived input directly into a transition directive. Astro applications that do not route untrusted input into these directives are unaffected. This issue has been fixed in version 7.0.4.

Publish Date: 2026-07-27

URL: CVE-2026-59727

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

Release Date: 2026-07-21

Fix Resolution: https://github.com/withastro/astro.git - astro@7.0.4

⛑️ Automatic Remediation will be attempted for this issue.

---

⛑️Automatic Remediation will be attempted for this issue.

[mend-for-github-com]

✔️ This issue was automatically closed by Mend because the vulnerable library in the specific branch(es) was either marked as ignored or it is no longer part of the Mend inventory.

[mend-for-github-com]

ℹ️ This issue was automatically re-opened by Mend because the vulnerable library in the specific branch(es) has been detected in the Mend inventory.