Insecure Deserialization in Kotaemon Affects Unauthenticated Access
CVE-2026-69098

9.3CRITICAL

Key Information:

Vendor

Cinnamon

Status
Kotaemon
Vendor
CVE Published:
4 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-69098?

Kotaemon versions up to 0.12.0 are susceptible to an insecure deserialization flaw in the check_connection endpoint. This vulnerability permits unauthenticated attackers to manipulate input—crafted YAML or JSON with a type field—allowing them to instantiate arbitrary Python classes. By exploiting this weakness, attackers can modify the type field to execute subprocess.check_output with arbitrary parameters, leading to remote code execution with the privileges of the application process.

Affected Version(s)

kotaemon 0 <= 0.12.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-69098 - Proof of Concept

References

https://github.com/Cinnamon/kotaemon/issues/844
technical-descriptionexploit
https://www.vulncheck.com/advisories/kotaemon-unauthentic...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

HK4zCzi
.