gcdRadar
archive/Patch now/AIR-2026-1584
closedclosed 27 Oct 2026Patch now2 Disclosed vulnerabilityAI

LiteLLM reflected XSS vulnerability in /sso/debug/callback

LiteLLM

An unauthenticated reflected cross-site scripting flaw exists in LiteLLM due to improper escaping of identity-provider-controlled fields within an inline script block. Attackers can execute arbitrary JavaScript in the proxy origin when an IdP returns crafted strings.

why this severityDisclosed vulnerability with no confirmed exploitation in the wild.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
6.8
fix status
Fix status unknown
affected
litellm >= 1.65.5, < 1.85.0
fixed in
litellm 1.85.0
first report
27 Oct 2026
last update
27 Oct 2026

Timeline · 1

  1. 27 Oct 2026GHSA-hhww-mrg2-969h: LiteLLM vulnerable to reflected XSS in /sso/debug/callback

Sources · 1

Advisories and databases

  1. 2026-10-27
    GHSA-hhww-mrg2-969h: LiteLLM vulnerable to reflected XSS in /sso/debug/callback
    GitHub Advisory Database · github.com/advisories/GHSA-hhww-mrg2-969h

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Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
xsslitellmsso
dates
happened 27 Oct 2026 · first reported 27 Oct 2026
origin
GitHub Advisory Database
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.90 · created 2026-10-27 20:48Z · updated 2026-10-27 20:48Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# LiteLLM reflected XSS vulnerability in /sso/debug/callback

https://gcdradar.vercel.app/incidents/litellm-reflected-xss-vulnerability-in-sso-debug-callback · AIR-2026-1584 · closed 2026-10-27

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability): Disclosed vulnerability with no confirmed exploitation in the wild.
- Fix status: Fix status unknown
- First reported: 2026-10-27
- AI role: Attack on AI
- Products: LiteLLM
- CVSS: 6.8

## Summary

An unauthenticated reflected cross-site scripting flaw exists in LiteLLM due to improper escaping of identity-provider-controlled fields within an inline script block. Attackers can execute arbitrary JavaScript in the proxy origin when an IdP returns crafted strings.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Affected and fixed versions

- Affected: litellm >= 1.65.5, < 1.85.0
- Fixed in: litellm 1.85.0

## Latest updates

- 2026-10-27: GHSA-hhww-mrg2-969h: LiteLLM vulnerable to reflected XSS in /sso/debug/callback (https://github.com/advisories/GHSA-hhww-mrg2-969h)

## Sources

- 2026-10-27 GitHub Advisory Database: GHSA-hhww-mrg2-969h: LiteLLM vulnerable to reflected XSS in /sso/debug/callback https://github.com/advisories/GHSA-hhww-mrg2-969h

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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