CVE-2025-48943Medium· 6.5▾ SunlitvLLM allows clients to crash the openai server with invalid regex
▾ Sunlit zone — Low / medium · no exploitation signal
impact 35.8 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 7.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
0.4%
0.4% → 0.5%
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
vllm >= 0.8.0, < 0.9.0Upgrade to a patched release:
vllm 0.9.0Connected by shared product, vendor, weakness, or advisory.
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