Vulnerability · Published Oct 30, 2026 · Assigned by GitHub_M

CVE-2026-119300Wekan: ReDoS via Unescaped User Input in RegExp

Medium 6.5

In plain English

A medium-severity regular-expression denial of service in wekan from wekan. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 77.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Wekan is open source kanban built with Meteor. Prior to 11.11, the user-search publication in server/publications/users.js and the searchUsers method in server/models/users.js pass authenticated user-controlled searchTerm and query values to new RegExp() without escaping regular-expression metacharacters. MongoDB-backed deployments evaluate the resulting patterns with PCRE2, allowing a logged-in user to submit catastrophic-backtracking expressions that consume database CPU and degrade or deny service to other users; searchUsers additionally requires board membership or site-admin status. The FerretDB v1 / RE2 unaffected configuration is not practically affected by catastrophic backtracking. This issue is fixed in version 11.11.

Affected products (as reported)

Vendor	Product	Versions
wekan	wekan	< 11.11

Weakness: CWE-1333 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/wekan/wekan/security/advisories/GHSA-9846-cj96-6hv5 x_refsource_CONFIRM
https://github.com/wekan/wekan/commit/4ce5cf6e102854d326e1dcacde6cd20614525dec x_refsource_MISC
https://github.com/wekan/wekan/releases/tag/v11.11 x_refsource_MISC