node-path-to-regexp: Impact: When using multiple wildcards, combined with at least one parameter, a regular expression can be generated t...
CVE-2026-4923 is fixed in node-path-to-regexp on 1 platform by DEBIAN-CVE-2026-4923 (version 8.4.0-1), released March 26, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| node-path-to-regexp · Debian 14 | 8.4.0-1 | DEBIAN-CVE-2026-4923 | Mar 26, 2026 |
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