CVE-2026-0562 json
Insecure Direct Object Reference (IDOR) in parisneo/lollms
published 7mo ago modified 4mo ago also PYSEC-2026-204 , EUVD-2026-17039
- cvss
- 8.3
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 19%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Is CVE-2026-0562 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 7mo ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- huntr.com https://huntr.com/bounties/6aab01ca-a138-4a1d-bef9-3bce145359bf referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 8.3 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L |
| NVD | 3.1 | 8.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L |
| OSV | 3.1 | 8.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | lollms | <2.1.1 |
2.1.1 |
Affected products
- parisneo parisneo/lollms
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/parisneo/lollms/commit/c46297799f8e1e23305373f8350746b905e0e83c
patch
-
huntr.com
/bounties/6aab01ca-a138-4a1d-bef9-3bce145359bf
exploit, issue-tracking, third-party-advisory, report
-
aydinnyunus.github.io
/2026/04/18/idor-lollms-friend-request-cve-2026-0562/
web
Sources
- CVE List CVE-2026-0562
- NVD CVE-2026-0562
- OSV PYSEC-2026-204
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