CVE-2026-54461 Habitica: Regex Injection / ReDoS in Member Search
An authenticated attacker can cause denial of service in Habitica by supplying a computationally expensive regular expression in the member search query parameter.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-54461?
CVE-2026-54461 is a medium-severity denial of service vulnerability in HabitRPG habitica, published on 24 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Habitica is a habit tracker application that treats goals like a role-playing game. From 4.172.1 until 5.48.2, a query parameter on Habitica's /api/v3/groups/:groupId/members route is not sanitized before being interpreted as a regular expression. An authenticated caller can supply a computationally expensive regular expression that degrades application performance or halts Node.js processes. This issue is fixed in version 5.48.2.
Weakness: CWE-1333
Which versions are affected by CVE-2026-54461?
How do I fix CVE-2026-54461?
No fix has been published for CVE-2026-54461 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-54461 being exploited?
There is no known exploitation of CVE-2026-54461 in the wild and no public exploit code.
Sources
Also known as GHSA-x772-22c9-gq58.