LiteLLM: Privilege escalation via unrestricted proxy configuration endpoint

CVE-2026-35029 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Impact

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 do the following:

  • 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
  • Take over other priveleged accounts by overwriting UI_USERNAME and UI_PASSWORD environment variables

Patches

Fixed in v1.83.0. The endpoint now requires proxy_admin role.

Workarounds

Restrict API key distribution. There is no configuration-level workaround.

Basic information

Type
reviewed
Severity
high
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2026-04-03 21:59:31 UTC
Updated
2026-05-06 18:40:48 UTC
GitHub reviewed
2026-04-03 21:59:31 UTC
NVD published
2026-04-06

EPSS Score

Score Percentile
14.94% 94.59%

CVSS Scores

Base score Version Severity Vector
8.7 4.0 —
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:L)
Low privileges are required.
User interaction (UI:N)
No user interaction is required.
Vulnerable system confidentiality impact (VC:H)
High confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:H)
High integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:H)
High availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:L)
Limited confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:L)
Limited integrity impact on subsequent systems.
Subsequent system availability impact (SA:N)
No availability impact on subsequent systems.

Identifiers

Type Value
GHSA GHSA-53mr-6c8q-9789 ↗
CVE CVE-2026-35029 ↗

CWEs

CWE id Name
CWE-863 Incorrect Authorization

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
pip litellm < 1.83.0 1.83.0 —

References

cvelogic Threat Intelligence