{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-86867",
        "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
        "state": "PUBLISHED",
        "assignerShortName": "certcc",
        "dateReserved": "2026-09-08T16:29:11.518Z",
        "datePublished": "2026-09-23T17:44:52.482Z",
        "dateUpdated": "2026-09-23T18:10:51.647Z"
    },
    "containers": {
        "cna": {
            "title": "Cinnamon's kotaemon contains improper authorization checks in multi‑user chat handlers",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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:\r\n1. Read other user's chat transcripts, RAG retrieval history, AI-generated plots, and chat suggestions.\r\n2. Permanently delete another user's conversation.\r\n3. Rename another user's conversation.\r\n4. Overwrite another user's conversation's chat suggestion list."
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "affected": [
                {
                    "vendor": "Cinnamon AI",
                    "product": "Kotaemon",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0.12.0"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "CWE-862 Missing Authorization"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "CWE-639 Authorization Bypass Through User-Controlled Key"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://kb.cert.org/vuls/id/754548"
                }
            ],
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                "env": "prod",
                "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-86867"
            },
            "providerMetadata": {
                "orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
                "shortName": "certcc",
                "dateUpdated": "2026-09-23T17:44:52.482Z"
            }
        },
        "adp": [
            {
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://www.kb.cert.org/vuls/id/754548"
                    }
                ],
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2026-09-23T18:10:51.647Z"
                }
            }
        ]
    }
}