CVE-2026-86867
VU#754548: Cinnamon's Kotaemon contains improper authorization checks in Kotaemon multi‑user chat handlers
Published Sep 23, 2026 · CERT/CC
Overview Cinnamon's Kotaemon (all versions up to v0.12.0) multi‑user chat interface does not verify conversation ownership when loading a conversation. Any authenticated user can read, delete, rename, or overwrite another user’s conversation data by supplying the correct ID. This results in high‑impact confidentiality, integrity, and availability violations. Description Cinnamon's Kotaemon is an open‑source, retrieval‑augmented generation (RAG) based tool that lets you build a chatbot capable of "chatting with your documents". As discu
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Sep 23, 2026 · CERT/CC Vulnerability Notes
Detected
Overview Cinnamon's Kotaemon (all versions up to v0.12.0) multi‑user chat interface does not verify conversation ownership when loading a conversation. Any authenticated user can read, delete, rename, or overwrite another user’s conversation data by supplying the correct ID. This results in high‑impact confidentiality, integrity, and availability violations. Description Cinnamon's Kotaemon is an o
Sources
- CERT/CC Vulnerability NotesGovernment advisoryCVE-2026-86867
Overview Cinnamon's Kotaemon (all versions up to v0.12.0) multi‑user chat interface does not verify conversation ownership when loading a conversation. Any authenticated user can read, delete, rename, or overwrite another user’s conversation data by supplying the correct ID. This
kb.cert.org - CVE.orgVulnerability recordCVE-2026-86867
Official CVE identifier
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