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.
INFO
Published Date :
2026-03-26T19:02:00.729Z
Last Modified :
2026-03-27T13:58:03.925Z
Source :
openjs
AFFECTED PRODUCTS
The following products are affected by CVE-2026-4923 vulnerability.
| Vendors | Products |
|---|---|
| Path-to-regexp |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-4923.
| URL | Resource |
|---|---|
| https://cna.openjsf.org/security-advisories.html |
|