CVE-2026-35029: LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format

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HIGH 8.8UPGRADE

CVE-2026-35029 is a high-severity flaw (CVSS 8.8) affecting litellm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 arbitrar

Why this priority

High severity
EPSS top 10%: very likely to be exploited

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	4.0% (top 10%)
CISA exploited list	No
Weakness	CWE-863, CWE-425
Published	2026-04-06
Last modified	2026-10-23

Publisher (CNA): GitHub, Inc. · Vendor: litellm

Am I affected?

Timeline

2026-04-06 17:17 UTCPublished CVE record published
2026-10-23 23:10 UTCUpdated Record last modified

litellm litellm UPGRADE

Affected: < 1.83.0

Fixed in: 1.83.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy litellm || rpm -q litellm || litellm --version

2. UPGRADE to 1.83.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade litellm

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade litellm

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Python (pip) · litellm · FIXED · 1.83.0 · vulnerable: < 1.83.0 · source

pip install --upgrade "litellm>=1.83.0" pip show litellm

Fedora 46 · python-openslide · FIXED · 1.4.7-1.fc46 · FEDORA-2026-336bea884e · source

sudo dnf upgrade --advisory=FEDORA-2026-336bea884e

Fedora ELN · valgrind · FIXED · 3.28.0-1.eln159 · FEDORA-2026-c593ef1d15 · source

sudo dnf upgrade --advisory=FEDORA-2026-c593ef1d15

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: learner202649/CVE-2026-35029-PoC (0 stars)
Nuclei scan template: LiteLLM - Arbitrary File Read

Advisories and coverage

Research and news

Check Point Research: When LLM Gateways Go Wrong: Findings from LiteLLM 2026-10-13

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Related CVEs

CVE-2026-59822 HIGH 8.2 EXPLOITED UPGRADE BerriAI LiteLLM Improper Authentication Vulnerability

References

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