Cinnamon kotaemon up to 0.12.0 check_connection __type__ deserialization

Summaryinfo

A vulnerability was found in Cinnamon kotaemon up to 0.12.0. It has been declared as critical. Affected is an unknown function of the component check_connection. Executing a manipulation of the argument __type__ can lead to deserialization. This vulnerability is handled as CVE-2026-69098. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Cinnamon kotaemon up to 0.12.0. It has been declared as critical. This vulnerability affects some unknown processing of the component check_connection. The manipulation of the argument __type__ with an unknown input leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-69098 since 08/03/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/04/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Cinnamon

Name

• kotaemon

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12.0

Website

• Product: https://github.com/Cinnamon/kotaemon/

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