CVE-2026-69098
kotaemon 0.12.0 Unauthenticated Remote Code Execution via Insecure Deserialization
- Published
- Aug 4, 2026
- Updated
- Aug 5, 2026
- Assigning CNA
- VulnCheck
- Evidence observed
- Aug 6, 2026
Primary CVSS
nvd · CVSS 4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XLow · next 30 days
- Percentile
- 59.3%
- Model date
- Oct 15, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
- CVE-2026-69098_exploitExploit
Unauthenticated remote code execution exploit targeting insecure YAML deserialization in LLM connection checks; supports arbitrary command execution and reverse shells via exposed Gradio API.
Responsible use
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