Description
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.
Published: 2026-09-23
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 24 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 24 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-200
CWE-639
CWE-862
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N'}


Thu, 24 Sep 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Cinnamon
Cinnamon kotaemon
Vendors & Products Cinnamon
Cinnamon kotaemon

Wed, 23 Sep 2026 20:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

Wed, 23 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
References

Wed, 23 Sep 2026 18:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Cinnamon's kotaemon contains improper authorization checks in multi‑user chat handlers
References

Subscriptions

Cinnamon Kotaemon
cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2026-09-24T14:37:20.022Z

Reserved: 2026-09-08T16:29:11.518Z

Link: CVE-2026-86867

cve-icon Vulnrichment

Updated: 2026-09-23T18:10:51.647Z

cve-icon NVD

Status : Deferred

Published: 2026-09-23T18:17:09.323

Modified: 2026-09-24T15:17:49.290

Link: CVE-2026-86867

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-24T09:10:36Z