Is CVE-2026-35029 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 4%.

What products does CVE-2026-35029 affect?

Tracked products affected include LiteLLM. Check the version you run to see whether it is affected.

How do I fix CVE-2026-35029?

Apply the vendor fix promptly. Upgrade affected products to a fixed version.

CVE-2026-35029

Q: What is CVE-2026-35029?

CVE-2026-35029 is a high-severity software vulnerability (Incorrect authorization) with a CVSS score of 8.8. LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.83.0, the /config/update endpoint does not enforce admin role authorization. A user who is already authenticated into the platform can then use

HIGH severity · CVSS 8.8 · Incorrect authorization

8.8CVSS HIGH

Summary

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.83.0, the /config/update endpoint does not enforce admin role authorization. A user who is already authenticated into the platform can then use this endpoint to modify proxy configuration and environment variables, register custom pass-through endpoint handlers pointing to attacker-controlled Python code, achieving remote code execution, read arbitrary server files by setting UI_LOGO_PATH and fetching via /get_image, and take over other privileged accounts by overwriting UI_USERNAME and UI_PASSWORD environment variables. Fixed in v1.83.0.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredLow

User interactionNone

Confidentiality impactHigh

Integrity impactHigh

Availability impactHigh

Exploit probability (EPSS)4%

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

LiteLLM

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

CVE-2026-35029

Summary

Impact & exploitability

Affected products we track (1)

Recommendation

Additional information