Server-Side Request Forgery (SSRF) in LiteLLM - CVE-2026-84377
Published: November 10, 2026
Vulnerability identifier: #VU164366
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-84377
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose configured provider credentials and other secrets and perform server-side request forgery against internal services.
The vulnerability exists due to incomplete denylist validation in the LiteLLM proxy when processing request-body routing and credential parameters, including nested parameters. A remote user can supply routing overrides that retain the operator's stored credentials to redirect provider calls to a controlled destination and exfiltrate secrets, or target internal services reachable from the proxy.
Affected software
LiteLLM
How to mitigate CVE-2026-84377
Install security update from vendor's website.
LiteLLM - addressed in versions 1.88.6, 1.89.7, 1.90.7, 1.91.5, 1.92.2, 1.93.2, 1.94.3, 1.95.1, 1.96.2