GCD AI RADAR
incidents/AIR-2026-0135

LiteLLM Proxy Bypass Allows Server-Side Request Redirection

Attack on AI2 Disclosed vulnerabilityInfrastructure vulnerability

Prior to 1.83.9, LiteLLM allowed authenticated callers to place api_base inside user_config to bypass safety checks. This lets attackers redirect outbound router requests to internal or external hosts.

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

Details

type
Attack on AI
An AI model, agent or AI-powered product was the thing exploited, abused or leaked.
categories
  • Infrastructure vulnerability
    CVEs and advisories in AI frameworks, inference servers, MCP servers, AI developer tools and hosting stacks.
owasp llm top 10
mitre atlas
no technique for these categories
Both rows are derived from the type and categories (OWASP 2025 edition, ATLAS release 2026.09), not classified per record. How
severity
2 · Disclosed vulnerability
CVE or vendor advisory, patched or patchable, no confirmed exploitation.
targets
Framework / tooling
products
LiteLLM
incident date
16 Sep 2026
first reported
16 Sep 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
classifier confidence
0.95 · published at or above 0.80; see the methodology
tags
CVE-2026-59823 · litellm · proxy
record
created 2026-10-18 06:33Z · updated 2026-10-18 07:00Z · json

Sources · 2

  1. 2026-09-16
    CVE-2026-59823: LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-59823
  2. 2026-09-17
    CVE-2026-59823: LiteLLM Proxy has server-side request forgery via the `user_config` request parameter
    GitHub Advisory Database · github.com/advisories/GHSA-hx8v-g79f-8w5f

Titles and links belong to their publishers. The summary above is written by GCD AI RADAR in its own words; data is CC BY-SA 4.0.

Related incidents