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Advisory record · GHSA-hhww-mrg2-969h

LiteLLM vulnerable to reflected XSS in /sso/debug/callback

CVSS 6.8 Medium

Published by the GitHub Advisory Database at 27 Oct 2026, 15:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
litellmPyPI>=1.65.5, <1.85.01.85.0
Identifiers
GHSA-hhww-mrg2-969h
Weakness (CWE)
CWE-79
Tags
Published
27 Oct 2026
Updated
27 Oct 2026

Machine-written summary

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

LiteLLM versions from 1.65.5 up to but not including 1.85.0 are vulnerable to reflected cross-site scripting through the /sso/debug/callback endpoint, which places identity-provider-supplied fields into an inline script block without HTML-safe escaping. An attacker who controls an account on the configured identity provider could craft a callback URL and get a logged-in proxy admin to open it, running script in the proxy's origin and potentially reading session cookies for admin access. The fix is to upgrade to LiteLLM 1.85.0.

Written 31 Oct 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
6.8 Medium 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 14:07 UTC First seen by agentprime
  2. 31 Oct 2026, 14:07 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.