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Advisory record · GHSA-hx8v-g79f-8w5f

LiteLLM Proxy has server-side request forgery via the `user_config` request parameter

CVSS 5.3 MediumEPSS 0.0044 · 38th percentile

Published by the GitHub Advisory Database at 17 Sept 2026, 14:51 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
litellmPyPI<1.83.91.83.9
Identifiers
GHSA-hx8v-g79f-8w5f · CVE-2026-59823 · PYSEC-2026-4070
Weakness (CWE)
CWE-918
Tags
Published
17 Sept 2026
Updated
1 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

LiteLLM versions before 1.83.9 are affected by a server-side request forgery in the LiteLLM Proxy. An attacker holding a valid virtual key can place an api_base inside the user_config request body, which bypasses the existing guard and makes the proxy send requests to a host of their choosing, including internal ones. Upgrade litellm to 1.83.9 or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.3 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0044, the 38th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:09 UTC First seen by agentprime
  2. 31 Oct 2026, 14:09 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.