CVE-2025-48943: vLLM allows clients to crash the openai server with invalid regex
(updated )
A denial of service bug caused the vLLM server to crash if an invalid regex was provided while using structured output. This vulnerability is similar to GHSA-6qc9-v4r8-22xg, but for regex instead of a JSON schema.
Issue with more details: https://github.com/vllm-project/vllm/issues/17313
References
- github.com/advisories/GHSA-9hcf-v7m4-6m2j
- github.com/pypa/advisory-database/tree/main/vulns/vllm/PYSEC-2025-55.yaml
- github.com/vllm-project/vllm
- github.com/vllm-project/vllm/commit/08bf7840780980c7568c573c70a6a8db94fd45ff
- github.com/vllm-project/vllm/issues/17313
- github.com/vllm-project/vllm/pull/17623
- github.com/vllm-project/vllm/security/advisories/GHSA-9hcf-v7m4-6m2j
- nvd.nist.gov/vuln/detail/CVE-2025-48943
Code Behaviors & Features
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