THREATPORT/VULNERABILITY/CVE-2026-35029
HIGH SEVERITY

CVE-2026-35029

Litellm vulnerability

CVSS
8.8
EPSS
26.4%
EPSS pct
98th
Exploited
No known
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.
Affected vendor
Litellm
Affected product
Litellm
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-863 — Incorrect Authorization
  • CWE-425 — Direct Request (Forced Browsing)
Published
2026-04-06

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 26.4% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2026-35029

  • Confirm whether Litellm Litellm is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2026-35029.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2026-35029

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