Vulnerability in Habitrpg Habitica
CVE-2026-54461
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.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
Published .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Habitrpg Habitica — versions >= 4.172.1, < 5.48.2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-54461?
- CVE-2026-54461 is a medium-severity vulnerability in Habitrpg Habitica, classified under Inefficient Regular Expression Complexity. CVSS score: 6.5/10. Published 2026-09-24.
- How severe is CVE-2026-54461?
- Medium severity. CVSS v3 base score is 6.5 out of 10.