---
id: CVE-2026-82281
title: >-
  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
summary: >-
  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 conversati…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-639
published: '2026-08-28'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:17:43.740'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82281'
references:
  - url: 'https://github.com/Cinnamon/kotaemon'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/Cinnamon/kotaemon/blob/9ad3e4e49aa35b8acddd235918a5d9753c1cfdf9/libs/ktem/ktem/pages/chat/control.py
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Cinnamon/kotaemon/issues/846'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/kotaemon-missing-ownership-check-in-conversation-functions
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Cinnamon/kotaemon/issues/846'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00331
epssPercentile: 0.23617
ingestedAt: '2026-09-23T17:28:14.815Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.