Auth bypass in Lollms
CVE-2026-0562
A critical security vulnerability in parisneo/lollms versions up to 2.2.0 allows any authenticated user to accept or reject friend requests belonging to other users. The `respond_request()` function in `backend/routers/friends.py` does not implement proper authorization checks, enabling Insecure Direct Object Reference (IDOR) attacks. Specifically, the `/api/friends/requests/{friendship_id}` endpoint fails to verify whether the authenticated user is part of the friendship or the intended recipient of the request. This vulnerability can lead to unauthorized access, privacy violations, and potential social engineering attacks. The issue has been addressed in version 2.2.0.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.003 (17.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Lollms
- Parisneo Parisneo/lollms — versions unspecified
Weakness classification (CWE)
References
- huntr.com/bounties/6aab01ca-a138-4a1d-bef9-3bce145359bf (Exploit, Third Party Advisory, Issue Tracking)
- github.com/parisneo/lollms/commit/c46297799f8e1e23305373f8350746b905e0e83c (Patch)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2026-0562?
- CVE-2026-0562 is a high-severity vulnerability in Lollms, classified under Incorrect Authorization. CVSS score: 8.3/10. Published 2026-03-29.
- How severe is CVE-2026-0562?
- High severity. CVSS v3 base score is 8.3 out of 10.