Auth bypass in Cinnamon Kotaemon
CVE-2026-82281
Kotaemon through 0.12.0 fails to properly validate conversation ownership in select_conv, delete_conv, rename_conv, and on_set_public_conversation functions in control.py. Attackers can read other users' chat histories, delete conversations, or rename conversations by supplying arbitrary conversation identifiers without proper authorization checks.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (24.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.4% 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: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/Cinnamon/kotaemon/issues/846 (issue-tracking)
- github.com/Cinnamon/kotaemon (product)
- github.com/Cinnamon/kotaemon/blob/9ad3e4e49aa35b8acddd235918a5d9753c1cfdf9/libs… (technical-description)
- www.vulncheck.com/advisories/kotaemon-missing-ownership-check-in-conversation-f… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-82281?
- CVE-2026-82281 is a high-severity vulnerability in Cinnamon Kotaemon, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.4/10. Published 2026-08-28.
- How severe is CVE-2026-82281?
- High severity. CVSS v3 base score is 7.4 out of 10.