astro-5.16.15.tgz: 1 vulnerabilities (highest severity is: 7.5)

[mend-for-github-com]

Vulnerable Library - astro-5.16.15.tgz

Path to dependency file: /docs/package.json

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

Found in HEAD commit: ec994c1a9bf5ae33c1721ef3568d20d917573751

Vulnerabilities

Vulnerability	Severity	CVSS	Dependency	Type	Fixed in (astro version)	Remediation Possible**
CVE-2026-33128	High	7.5	h3-1.15.5.tgz	Transitive	N/A*	❌

*For some transitive vulnerabilities, there is no version of direct dependency with a fix. Check the "Details" section below to see if there is a version of transitive dependency where vulnerability is fixed.

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

Details

CVE-2026-33128

Vulnerable Library - h3-1.15.5.tgz

Minimal H(TTP) framework built for high performance and portability.

Library home page: https://registry.npmjs.org/h3/-/h3-1.15.5.tgz

Path to dependency file: /docs/package.json

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

Dependency Hierarchy:

• astro-5.16.15.tgz (Root Library)
  • unstorage-1.17.4.tgz
    • ❌ h3-1.15.5.tgz (Vulnerable Library)

Found in HEAD commit: ec994c1a9bf5ae33c1721ef3568d20d917573751

Found in base branch: main

Vulnerability Details

H3 is a minimal H(TTP) framework. In versions prior to 1.15.6 and between 2.0.0 through 2.0.1-rc.14, createEventStream is vulnerable to Server-Sent Events (SSE) injection due to missing newline sanitization in formatEventStreamMessage() and formatEventStreamComment(). An attacker who controls any part of an SSE message field (id, event, data, or comment) can inject arbitrary SSE events to connected clients. This issue is fixed in versions 1.15.6 and 2.0.1-rc.15.

Publish Date: 2026-03-20

URL: CVE-2026-33128

CVSS 3 Score Details (7.5)

Base Score Metrics:

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

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Release Date: 2026-03-18

Fix Resolution: https://github.com/h3js/h3.git - v1.15.6,https://github.com/h3js/h3.git - v2.0.1-rc.15

[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.

[krisfreedain]

@kylehounslow @goyamegh @vamsimanohar @anirudha @ps48 can you take a look?

Catch All Triage - 1 2 3