CVE-2026-86867
mediumpriority · track · 0OT risk · elevatedEPSS 0.002 · 15 %ileUSEPSS · scored 2026-10-27
Cinnamon's Kotaemon (all versions up to and including v0.12.0) multi-user chat interface contains multiple vulnerabilities due to incorrect authorization and improper access controls. There are four handler methods in `libs/ktem/ktem/pages/chat/control.py` that load a Conversation record by its ID without comparing the requester's `user_id` to the conversation's owner `Conversation.user`. This allows any authenticated user to perform the following actions: 1. Read other user's chat transcripts, RAG retrieval history, AI-generated plots, and chat suggestions. 2. Permanently delete another user's conversation. 3. Rename another user's conversation. 4. Overwrite another user's conversation's chat suggestion list.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
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weaknesses
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affected products
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No affected products recorded.
advisories (1)
Vendor and ecosystem advisories describing this.
- VU#754548CERT/CC Vulnerability Note VU#7545482026-09-23vendor · cert_cc_vinceUS
sources
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references (2) nvd
External citations — patches, advisories, analysis.
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