LiteLLM: Server-Side Template Injection in /prompts/test endpoint (BerriAI litellm)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.37 % · percentile 31 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Modified
Description
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From version 1.80.5 to before version 1.83.7, the POST /prompts/test endpoint accepted user-supplied prompt templates and rendered them without sandboxing. A crafted template could run arbitrary code inside the LiteLLM Proxy process. The endpoint only checks that the caller presents a valid proxy API key, so any authenticated user could reach it. Depending on how the proxy is deployed, this could expose secrets in the process environment (such as provider API keys or database credentials) and allow commands to be run on the host. This issue has been patched in version 1.83.7.
Weaknesses (CWE)
- CWE-1336 — Improper Neutralization of Special Elements Used in a Template Engine
- CWE-94 — Improper Control of Generation of Code
References
- https://github.com/BerriAI/litellm/security/advisories/GHSA-xqmj-j6mv-4862
- https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable
- https://access.redhat.com/security/cve/CVE-2026-42203
- https://bugzilla.redhat.com/show_bug.cgi?id=2467917
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42203.json
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | HIGH 8.6 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | GitHub_M |
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | redhat-SADP |
| CVSS 4.0 | HIGH 8.6 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Advisories
- GHSA-xqmj-j6mv-4862 — LiteLLM: Server-Side Template Injection in /prompts/test endpoint
- PYSEC-2026-2602 — LiteLLM: Server-Side Template Injection in /prompts/test endpoint
European references
- ENISA EUVD · EUVD-2026-28502
- GCVE · GCVE-0-2026-42203
Affected configurations (NVD CPE)
cpe:2.3:a:litellm:litellm:*:*:*:*:*:*:*:*≥ 1.80.5 < 1.83.7
Affected products
| Product | Versions |
|---|---|
| BerriAI · litellm | affected >= 1.80.5, < 1.83.7 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |