CVE-2026-4923 (Medium) detected in path-to-regexp-8.3.0.tgz - autoclosed

[mend-bolt-for-github]

CVE-2026-4923 - Medium Severity Vulnerability

Vulnerable Library - path-to-regexp-8.3.0.tgz

Express style path to RegExp utility

Library home page: https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-8.3.0.tgz

Path to dependency file: /ui/package.json

Path to vulnerable library: /ui/node_modules/.pnpm/path-to-regexp@8.3.0/node_modules/path-to-regexp/package.json

Dependency Hierarchy:

• @postgres.ai/ce-4.0.3.tgz (Root Library)
  • react-scripts-5.0.1.tgz
    • webpack-dev-server-4.15.2.tgz
      • express-5.2.1.tgz
        • router-2.2.0.tgz
          • ❌ path-to-regexp-8.3.0.tgz (Vulnerable Library)

Found in base branch: master

Vulnerability Details

Impact:
When using multiple wildcards, combined with at least one parameter, a regular expression can be generated that is vulnerable to ReDoS. This backtracking vulnerability requires the second wildcard to be somewhere other than the end of the path.
Unsafe examples:
/*foo-*bar-:baz
/*a-:b-*c-:d
/x/*a-:b/*c/y
Safe examples:
/*foo-:bar
/*foo-:bar-*baz
Patches:
Upgrade to version 8.4.0.
Workarounds:
If you are using multiple wildcard parameters, you can check the regex output with a tool such as https://makenowjust-labs.github.io/recheck/playground/ to confirm whether a path is vulnerable.

Publish Date: 2026-03-26

URL: CVE-2026-4923

CVSS 3 Score Details (5.9)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: High
  • 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

Origin: GHSA-27v5-c462-wpq7

Release Date: 2026-03-26

Fix Resolution: path-to-regexp - 8.4.0

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[mend-bolt-for-github]

✔️ 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.