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Advisory record · GHSA-46cm-pfwv-cgf8

LiteLLM has Server-Side Template Injection vulnerability in /completions endpoint

CVSS 9.8 CriticalCriticalEPSS 0.013 · 69th percentile

Critical, because:

  • CVSS score 9.8: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 10 Apr 2024, 18:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
litellmPyPI<1.34.421.34.42
Identifiers
GHSA-46cm-pfwv-cgf8 · CVE-2024-2952 · PYSEC-2026-387
Weakness (CWE)
CWE-76
Tags
Published
10 Apr 2024
Updated
10 Sept 2026

Machine-written summary

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

LiteLLM versions before 1.34.42 are vulnerable to server-side template injection through the /completions endpoint. The hf_chat_template method renders the chat_template value from tokenizer_config.json with Jinja without sanitization, so an attacker who can supply a malicious tokenizer_config.json could execute arbitrary code on the server. Upgrade litellm to version 1.34.42 or later.

Written 5 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
9.8 Critical 3.0 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CNA (@huntr_ai)
  • CISA KEV Not listed.
  • EPSS 0.013, the 69th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:35 UTC First seen by agentprime
  2. 31 Oct 2026, 14:35 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.