CVE-2026-82281: Kotaemon Missing Ownership Check in Conversation Functions

Severity: high (CVSS 7.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-28 · updated 2026-09-23
Weakness: CWE-639

Description

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.

Affected products

Cinnamon kotaemon: through 0.12.0

References

https://github.com/Cinnamon/kotaemon
https://github.com/Cinnamon/kotaemon/blob/9ad3e4e49aa35b8acddd235918a5d9753c1cfdf9/libs/ktem/ktem/pages/chat/control.py
https://github.com/Cinnamon/kotaemon/issues/846
https://www.vulncheck.com/advisories/kotaemon-missing-ownership-check-in-conversation-functions
https://github.com/Cinnamon/kotaemon/issues/846

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