CVE Explorer
CVE-2026-55574
vLLM is a high-throughput and memory-efficient inference and serving engine for LLMs. Prior to 0.24.0, the structured_outputs.regex API parameter passes a user-supplied regular expression string directly to the grammar compiler backends with no compilation timeout; in the xgrammar backend the string reaches the regex compiler with no guard, and in the outlines backend the validation step blocks structural issues such as lookarounds and backreferences but performs no complexity analysis, so a pat
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"vllm","vendor":"vllm-project","versions":[{"status":"affected","version":"< 0.24.0"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:92f39d6d6a78282d32c66019d602bccf4dc8c70dcd3001f84a9494a4fabb0494 · sha256:8c58328f82194f53… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:92f39d6d6a78282d32c66019d602bccf4dc8c70dcd3001f84a9494a4fabb0494 · sha256:8c58328f82194f53… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-1333","description":"CWE-1333: Inefficient Regular Expression Complexity","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:92f39d6d6a78282d32c66019d602bccf4dc8c70dcd3001f84a9494a4fabb0494 · sha256:8c58328f82194f53… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"name":"https://github.com/vllm-project/vllm/commit/2b3006076c5e9bc4cda9e03e3641388de3c5c286","tags":["x_refsource_MISC"],"url":"https://github.com/vllm-project/vllm/commit/2b3006076c5e9bc4cda9e03e3641388de3c5c286"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:92f39d6d6a78282d32c66019d602bccf4dc8c70dcd3001f84a9494a4fabb0494 · sha256:8c58328f82194f53… · /containers/cna/references/2
{"name":"https://github.com/vllm-project/vllm/pull/45118","tags":["x_refsource_MISC"],"url":"https://github.com/vllm-project/vllm/pull/45118"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:92f39d6d6a78282d32c66019d602bccf4dc8c70dcd3001f84a9494a4fabb0494 · sha256:8c58328f82194f53… · /containers/cna/references/1
{"name":"https://github.com/vllm-project/vllm/security/advisories/GHSA-rwxx-mrjm-wc2m","tags":["x_refsource_CONFIRM"],"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-rwxx-mrjm-wc2m"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:92f39d6d6a78282d32c66019d602bccf4dc8c70dcd3001f84a9494a4fabb0494 · sha256:8c58328f82194f53… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.