{
"id": "GHSA-4qgc-qr9j-76rw",
"aliases": [
"CVE-2026-82281"
],
"details": "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": [],
"modified": "2026-08-28T21:31:26Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"published": "2026-08-28T21:31:26Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82281",
"type": "ADVISORY"
},
{
"url": "https://github.com/Cinnamon/kotaemon/issues/846",
"type": "WEB"
},
{
"url": "https://github.com/Cinnamon/kotaemon",
"type": "WEB"
},
{
"url": "https://github.com/Cinnamon/kotaemon/blob/9ad3e4e49aa35b8acddd235918a5d9753c1cfdf9/libs/ktem/ktem/pages/chat/control.py",
"type": "WEB"
},
{
"url": "https://www.vulncheck.com/advisories/kotaemon-missing-ownership-check-in-conversation-functions",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-639"
],
"severity": "CRITICAL",
"github_reviewed": false,
"nvd_published_at": "2026-08-28T20:20:19Z",
"github_reviewed_at": null
}
}