CVEvulnerability

CVE-2026-4923

5.9 MEDIUM Published 2026-03-26 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-03-26
Last modified
2026-06-17
Assigner
ce714d77-add3-4f53-aff5-83d477b104bb
CVSS 3.1 (ce714d77-add3-4f53-aff5-83d477b104bb)
5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-1333

Description

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.

Affected configurations

• pillarjs path-to-regexp (>= 8.0.0 < 8.4.0)

Related

Weakness · CWE (1)

  • CWE-1333 Inefficient Regular Expression Complexity weakness

References