GHSA-9hcf-v7m4-6m2j
vLLM allows clients to crash the openai server with invalid regex
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
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](https://github.com/vllm-project/vllm/security/advisories/GHSA-6qc9-v4r8-22xg), but for regex instead of a JSON schema.
Issue with more details: https://github.com/vllm-project/vllm/issues/17313
### Patches
* https://github.com/vllm-project/vllm/pull/17623
References
External links from the advisory. They lead to third-party sites.
- https://github.com/vllm-project/vllm/security/advisories/GHSA-9hcf-v7m4-6m2j
- https://nvd.nist.gov/vuln/detail/CVE-2025-48943
- https://github.com/vllm-project/vllm/issues/17313
- https://github.com/vllm-project/vllm/pull/17623
- https://github.com/vllm-project/vllm/commit/08bf7840780980c7568c573c70a6a8db94fd45ff
- https://github.com/pypa/advisory-database/tree/main/vulns/vllm/PYSEC-2025-55.yaml
- https://github.com/vllm-project/vllm