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CVE-2026-35029

8.8 · HIGH

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format.

Published Apr 6, 2026CWE-863EPSS 3.98%

Overview

CVE-2026-35029 is a high-severity vulnerability. It was published on April 6, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/BerriAI/litellm/security/advisories/GHSA-53mr-6c8q-9789Refseclists.org/fulldisclosure/2026/Apr/17Refaccess.redhat.com/errata/RHSA-2026:13545Refaccess.redhat.com/errata/RHSA-2026:28960Refaccess.redhat.com/errata/RHSA-2026:30056Refaccess.redhat.com/security/cve/CVE-2026-35029Refbugzilla.redhat.com/show_bug.cgi?id=2455474Refsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35029.json

How CyberStrike helps

Frequently asked questions

What is CVE-2026-35029?

CVE-2026-35029 is a high-severity vulnerability. It was published on April 6, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-35029?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-35029?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-35029?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-35029 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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