Inefficient regular expression complexity in Habitica - CVE-2026-54461
Published: November 10, 2026
Vulnerability identifier: #VU164353
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-54461
CWE-ID: CWE-1333
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service by degrading application performance or halting Node.js processes.
The vulnerability exists due to insufficient sanitization of regular expression input in Habitica's /api/v3/groups/:groupId/members route when processing member search queries. A remote user can submit a query containing a computationally expensive regular expression to exhaust processing resources and disrupt application availability.
Affected software
Habitica
How to mitigate CVE-2026-54461
Install security update from vendor's website.
Habitica - update to 5.48.2