CVE-2026-69098

9.8 CRITICALpublic exploit available

Published 2026-08-04 · Updated 2026-08-05

AI risk analysis

Summary: The flaw allows unauthenticated attackers to execute arbitrary code by deserializing crafted YAML/JSON input, posing a significant security risk.
Exploitability: Exploitation is relatively straightforward requiring only crafting specific input with a __type__ field and application process privileges.
Blast radius: If exploited, this vulnerability could lead to full control over the affected system, impacting all users and services running on it.
Prioritized remediation: Update to the latest version of kotaemon (0.13 or later) which addresses this issue.

rceyaml-deserializationwebcritical

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

kotaemon through 0.12.0 contains an insecure deserialization vulnerability in the check_connection endpoint that allows unauthenticated attackers to instantiate arbitrary Python classes by supplying crafted YAML/JSON input with a __type__ field. Attackers can exploit this to override the __type__ field with subprocess.check_output and arbitrary arguments, achieving remote code execution with application process privileges.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-502

Public exploit & PoC references

https://github.com/Cinnamon/kotaemon/issues/844

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.