Improper access control in LiteLLM - CVE-2026-59819
Published: July 1, 2026
Vulnerability identifier: #VU136049
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-59819
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in the /health/test_connection endpoint when resolving request-supplied OIDC file references in litellm_params. A remote privileged user can supply an oidc/file/ reference to cause LiteLLM to read files from the local filesystem and disclose sensitive information.
Exploitation requires permission to test model connections.
Affected software
LiteLLM
How to mitigate CVE-2026-59819
Install security update from vendor's website.
LiteLLM - update to 1.83.14