astro-5.16.15.tgz: 5 vulnerabilities (highest severity is: 7.5) - autoclosed

[mend-for-github-com]

Vulnerable Library - astro-5.16.15.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-5.16.15.tgz

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

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

Found in HEAD commit: ec994c1a9bf5ae33c1721ef3568d20d917573751

Vulnerabilities

Vulnerability	Severity	CVSS	Dependency	Type	Fixed in (astro version)	Remediation Possible**
CVE-2026-35209	High	7.5	defu-6.1.4.tgz	Transitive	N/A*	❌
CVE-2026-33671	High	7.5	detected in multiple dependencies	Transitive	N/A*	❌
CVE-2026-33128	High	7.5	h3-1.15.5.tgz	Transitive	N/A*	❌
CVE-2026-33769	Medium	5.3	astro-5.16.15.tgz	Direct	5.18.1	✅
CVE-2026-33672	Medium	5.3	detected in multiple dependencies	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-2026-35209

Vulnerable Library - defu-6.1.4.tgz

Library home page: https://registry.npmjs.org/defu/-/defu-6.1.4.tgz

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

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

Dependency Hierarchy:

• astro-5.16.15.tgz (Root Library)
  • unstorage-1.17.4.tgz
    • h3-1.15.5.tgz
      • ❌ defu-6.1.4.tgz (Vulnerable Library)

Found in HEAD commit: ec994c1a9bf5ae33c1721ef3568d20d917573751

Found in base branch: main

Vulnerability Details

defu is software that allows uers to assign default properties recursively. Prior to version 6.1.5, applications that pass unsanitized user input (e.g. parsed JSON request bodies, database records, or config files from untrusted sources) as the first argument to "defu()" are vulnerable to prototype pollution. A crafted payload containing a "proto" key can override intended default values in the merged resul. The internal "_defu" function used "Object.assign({}, defaults)" to copy the defaults object. "Object.assign" invokes the "proto" setter, which replaces the resulting object's "[[Prototype]]" with attacker-controlled values. Properties inherited from the polluted prototype then bypass the existing "proto" key guard in the "for...in" loop and land in the final result. Version 6.1.5 replaces "Object.assign({}, defaults)" with object spread ("{ ...defaults }"), which uses "[[DefineOwnProperty]]" and does not invoke the "proto" setter.

Publish Date: 2026-04-06

URL: CVE-2026-35209

CVSS 3 Score Details (7.5)

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: High
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-737v-mqg7-c878

Release Date: 2026-04-04

Fix Resolution: defu - 6.1.5

CVE-2026-33671

Vulnerable Libraries - picomatch-4.0.3.tgz, picomatch-2.3.1.tgz

picomatch-4.0.3.tgz

Blazing fast and accurate glob matcher written in JavaScript, with no dependencies and full support for standard and extended Bash glob features, including braces, extglobs, POSIX brackets, and regular expressions.

Library home page: https://registry.npmjs.org/picomatch/-/picomatch-4.0.3.tgz

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

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

Dependency Hierarchy:

• astro-5.16.15.tgz (Root Library)
  • ❌ picomatch-4.0.3.tgz (Vulnerable Library)

picomatch-2.3.1.tgz

Blazing fast and accurate glob matcher written in JavaScript, with no dependencies and full support for standard and extended Bash glob features, including braces, extglobs, POSIX brackets, and regular expressions.

Library home page: https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz

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

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

Dependency Hierarchy:

• astro-5.16.15.tgz (Root Library)
  • unstorage-1.17.4.tgz
    • anymatch-3.1.3.tgz
      • ❌ picomatch-2.3.1.tgz (Vulnerable Library)

Found in HEAD commit: ec994c1a9bf5ae33c1721ef3568d20d917573751

Found in base branch: main

Vulnerability Details

Picomatch is a glob matcher written JavaScript. Versions prior to 4.0.4, 3.0.2, and 2.3.2 are vulnerable to Regular Expression Denial of Service (ReDoS) when processing crafted extglob patterns. Certain patterns using extglob quantifiers such as "+()" and "()", especially when combined with overlapping alternatives or nested extglobs, are compiled into regular expressions that can exhibit catastrophic backtracking on non-matching input. Applications are impacted when they allow untrusted users to supply glob patterns that are passed to "picomatch" for compilation or matching. In those cases, an attacker can cause excessive CPU consumption and block the Node.js event loop, resulting in a denial of service. Applications that only use trusted, developer-controlled glob patterns are much less likely to be exposed in a security-relevant way. This issue is fixed in picomatch 4.0.4, 3.0.2 and 2.3.2. Users should upgrade to one of these versions or later, depending on their supported release line. If upgrading is not immediately possible, avoid passing untrusted glob patterns to "picomatch". Possible mitigations include disabling extglob support for untrusted patterns by using "noextglob: true", rejecting or sanitizing patterns containing nested extglobs or extglob quantifiers such as "+()" and "()", enforcing strict allowlists for accepted pattern syntax, running matching in an isolated worker or separate process with time and resource limits, and applying application-level request throttling and input validation for any endpoint that accepts glob patterns.

Publish Date: 2026-03-26

URL: CVE-2026-33671

CVSS 3 Score Details (7.5)

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: None
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Release Date: 2026-03-25

Fix Resolution: https://github.com/micromatch/picomatch.git - 3.0.2,https://github.com/micromatch/picomatch.git - 4.0.4,https://github.com/micromatch/picomatch.git - 2.3.2

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/starlight-docs/package.json

Path to vulnerable library: /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

CVE-2026-33769

Vulnerable Library - astro-5.16.15.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-5.16.15.tgz

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

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

Dependency Hierarchy:

• ❌ astro-5.16.15.tgz (Vulnerable Library)

Found in HEAD commit: ec994c1a9bf5ae33c1721ef3568d20d917573751

Found in base branch: main

Vulnerability Details

Astro is a web framework. From version 2.10.10 to before version 5.18.1, this issue concerns Astro's remotePatterns path enforcement for remote URLs used by server-side fetchers such as the image optimization endpoint. The path matching logic for /* wildcards is unanchored, so a pathname that contains the allowed prefix later in the path can still match. As a result, an attacker can fetch paths outside the intended allowlisted prefix on an otherwise allowed host. This issue has been patched in version 5.18.1.

Publish Date: 2026-03-24

URL: CVE-2026-33769

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: Low
  • Integrity Impact: None
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-g735-7g2w-hh3f

Release Date: 2026-03-24

Fix Resolution: 5.18.1

⛑️ Automatic Remediation will be attempted for this issue.

CVE-2026-33672

Vulnerable Libraries - picomatch-4.0.3.tgz, picomatch-2.3.1.tgz

picomatch-4.0.3.tgz

Blazing fast and accurate glob matcher written in JavaScript, with no dependencies and full support for standard and extended Bash glob features, including braces, extglobs, POSIX brackets, and regular expressions.

Library home page: https://registry.npmjs.org/picomatch/-/picomatch-4.0.3.tgz

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

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

Dependency Hierarchy:

• astro-5.16.15.tgz (Root Library)
  • ❌ picomatch-4.0.3.tgz (Vulnerable Library)

picomatch-2.3.1.tgz

Blazing fast and accurate glob matcher written in JavaScript, with no dependencies and full support for standard and extended Bash glob features, including braces, extglobs, POSIX brackets, and regular expressions.

Library home page: https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz

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

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

Dependency Hierarchy:

• astro-5.16.15.tgz (Root Library)
  • unstorage-1.17.4.tgz
    • anymatch-3.1.3.tgz
      • ❌ picomatch-2.3.1.tgz (Vulnerable Library)

Found in HEAD commit: ec994c1a9bf5ae33c1721ef3568d20d917573751

Found in base branch: main

Vulnerability Details

Picomatch is a glob matcher written JavaScript. Versions prior to 4.0.4, 3.0.2, and 2.3.2 are vulnerable to a method injection vulnerability affecting the "POSIX_REGEX_SOURCE" object. Because the object inherits from "Object.prototype", specially crafted POSIX bracket expressions (e.g., "[[:constructor:]]") can reference inherited method names. These methods are implicitly converted to strings and injected into the generated regular expression. This leads to incorrect glob matching behavior (integrity impact), where patterns may match unintended filenames. The issue does not enable remote code execution, but it can cause security-relevant logic errors in applications that rely on glob matching for filtering, validation, or access control. All users of affected "picomatch" versions that process untrusted or user-controlled glob patterns are potentially impacted. This issue is fixed in picomatch 4.0.4, 3.0.2 and 2.3.2. Users should upgrade to one of these versions or later, depending on their supported release line. If upgrading is not immediately possible, avoid passing untrusted glob patterns to picomatch. Possible mitigations include sanitizing or rejecting untrusted glob patterns, especially those containing POSIX character classes like "[[:...:]]"; avoiding the use of POSIX bracket expressions if user input is involved; and manually patching the library by modifying "POSIX_REGEX_SOURCE" to use a null prototype.

Publish Date: 2026-03-26

URL: CVE-2026-33672

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

Release Date: 2026-03-25

Fix Resolution: https://github.com/micromatch/picomatch.git - 2.3.2,https://github.com/micromatch/picomatch.git - 4.0.4,https://github.com/micromatch/picomatch.git - 3.0.2

---

⛑️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.

[krisfreedain]

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

Catch All Triage - 1 2 3