CVE-2026-69098 Details
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.
A vulnerability allowing insecure deserialization has been identified in Kotaemon versions through 0.12.0, specifically within the '/check_connection' endpoint. This flaw enables unauthenticated attackers to instantiate arbitrary Python classes by sending crafted YAML or JSON input that includes a '__type__' field. Exploitation of this vulnerability allows attackers to manipulate the '__type__' field to include 'subprocess.check_output' with chosen arguments, resulting in remote code execution on the server with the privileges of the application process.
Remove 'safe=False' from all 'deserialize()' calls in 'llms/ui.py', 'index/' and 'app.py'. Add 'user_id' as a wired input to 'check_connection' and 'create_llm', and enforce 'admin=True' server-side before executing any LLM management actions.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Aug 4, 2026CISA-ADP
Assessed Aug 5, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Cinnamon/kotaemon/issues/844 | [email protected] | ExploitIssue TrackingTechnical AnalysisVendor |
| https://www.vulncheck.com/advisories/kotaemon-unauthenticated-remote-code-execution-via-insecure-deserialization | [email protected] | Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-502 | Deserialization of Untrusted Data | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Cinnamon kotaemon | <= 0.12.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 5, 2026 | CVE Modified | CISA-ADP |
| Aug 4, 2026 | New CVE Received | [email protected] |