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CVE-2026-35029 — Vulnerability in litellm — CVE Details

HIGH

LiteLLM: Privilege escalation via unrestricted proxy configuration endpoint

Published April 3, 2026Updated September 10, 2026Source: osv

Summary

### 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.

Advisory Timeline

  • First published April 3, 2026 (192 days ago).
  • Last revised September 10, 2026 — 159 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

pip
Update litellm to 1.83.0 or later
pip install "litellm>=1.83.0"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: pypi (1).

PackageEcosystemAffectedFixed In
litellm
pypi
0.1.0, 0.1.1, 0.1.2, 0.1.201 (+723 more)1.83.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-863
    Incorrect AuthorizationMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.9 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
—
Confidentiality
—
Integrity
—
Availability
—

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

References

Frequently Asked Questions

What is CVE-2026-35029?
LiteLLM: Privilege escalation via unrestricted proxy configuration endpoint This vulnerability has been assigned a severity rating of HIGH (CVSS score: 9.9/10).
How do I check if my project is affected by CVE-2026-35029?
CVE-2026-35029 affects litellm. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-35029 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.9

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-53mr-6c8q-9789
PYSEC-2026-2597

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