Privilege escalation in Berriai Litellm

CVE-2026-114612

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From 1.87.0 until 1.100.4, 1.101.3, 1.102.2, 1.103.1, and 1.104.0-rc.2, the proxy reuses one cryptographic context for at-rest secrets and session tokens, allowing an authenticated internal user to have crafted metadata containing a forged administrator credential encrypted and returned by the API-key flow. Replaying that ciphertext as a bearer token causes the proxy to trust the forged proxy administrator identity, permitting administrative access and arbitrary commands through the MCP stdio endpoint. Versions 1.87.0 through 1.90.x require EXPERIMENTAL_UI_LOGIN to be enabled, while versions after 1.91.0 are exploitable in the default configuration. This issue was fixed in LiteLLM 1.100.4, 1.101.3, 1.102.2, 1.103.1, and 1.104.0-rc.2.

Vulnerability class: Privilege Escalation

Published .

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

  • Berriai Litellm — versions >= 1.101.0, < 1.101.3, >= 1.102.0, < 1.102.2, >= 1.103.0, < 1.103.1

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-114612?
CVE-2026-114612 is a critical-severity vulnerability in Berriai Litellm, classified under Improper Privilege Management. CVSS score: 9.9/10. Published 2026-10-22.
How severe is CVE-2026-114612?
Critical severity. CVSS v3 base score is 9.9 out of 10.