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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Cinnamon kotaemon affected
Version Status Constraints
0 affected ≤ 0.12.0

No data.

No data.

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Vendors Products
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Kotaemon Subscribe

Project Subscriptions

Vendors Products
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Kotaemon Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/Cinnamon/kotaemon/issues/844 cve-icon
https://www.vulncheck.com/advisories/kotaemon-unauthenticated-remote-code-execution-via-insecure-deserialization cve-icon
History

Tue, 04 Aug 2026 15:45:00 +0000

Type Values Removed Values Added
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.
Title kotaemon 0.12.0 Unauthenticated Remote Code Execution via Insecure Deserialization
First Time appeared Cinnamon
Cinnamon kotaemon
Weaknesses CWE-502
CPEs cpe:2.3:a:cinnamon:kotaemon:0.0.0:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.1.0:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.2.0:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.3.0:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.3.1:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.3.2:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.3.3:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.3.4:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.3.5:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.3.6:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.4.0:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.4.1:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.4.2:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.4.3:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.4.4:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.4.5:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.4.6:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.4.7:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.4.8:*:*:*:*:*:*:*
cpe:2.3:a:cinnamon:kotaemon:0.4.9:*:*:*:*:*:*:*
Vendors & Products Cinnamon
Cinnamon kotaemon
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-04T15:15:06.018Z

Reserved: 2026-08-03T10:44:14.336Z

Link: CVE-2026-69098

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-04T17:00:12Z

Weaknesses