medium6.5
CVE-2025-48943
vLLM allows clients to crash the openai server with invalid regex
Impact
### 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
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | vllm | >= 0.8.0, < 0.9.0 | 0.9.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Vllm | Vllm | from 0.8.0 before 0.9.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/vllm-project/vllm/commit/08bf7840780980c7568c573c70a6a8db94fd45ff
- https://github.com/vllm-project/vllm/issues/17313
- https://github.com/vllm-project/vllm/pull/17623
- https://github.com/vllm-project/vllm/security/advisories/GHSA-9hcf-v7m4-6m2j
- https://github.com/advisories/GHSA-9hcf-v7m4-6m2j
- https://nvd.nist.gov/vuln/detail/CVE-2025-48943
- https://github.com/pypa/advisory-database/tree/main/vulns/vllm/PYSEC-2025-55.yaml