CVE-2025-62426
vLLM is an inference and serving engine for large language models (LLMs). From version 0.5.5 to before 0.11.1, the /v1/chat/completions and /tokenize endpoints allow a chat_template_kwargs request parameter that is used in the code before it is properly validated against the chat template. With the right chat_template_kwargs parameters, it is possible to block processing of the API server for long periods of time, delaying all other requests. This issue has been patched in version 0.11.1.
| Software | From | Fixed in |
|---|---|---|
vllm
|
0.5.5 | 0.11.1 |
| vllm / vllm | 0.5.5 | 0.11.1 |
| vllm / vllm | 0.11.1-rc0 | 0.11.1-rc0.x |
| vllm / vllm | 0.11.1-rc1 | 0.11.1-rc1.x |
- https://github.com/vllm-project/vllm/blob/2a6dc67eb520ddb9c4138d8b35ed6fe6226997fb/vllm/entrypoints/chat_utils.py#L1602-L1610
- https://github.com/vllm-project/vllm/blob/2a6dc67eb520ddb9c4138d8b35ed6fe6226997fb/vllm/entrypoints/openai/serving_engine.py#L809-L814
- https://github.com/vllm-project/vllm/commit/3ada34f9cb4d1af763fdfa3b481862a93eb6bd2b
- https://github.com/vllm-project/vllm/pull/27205
- https://github.com/vllm-project/vllm/security/advisories/GHSA-69j4-grxj-j64p
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