{"cve":"CVE-2026-105757","nvd":{"published":"2026-10-05T23:17:02.467","modified":"2026-10-08T01:28:00.630","status":"Analyzed","description":"vLLM is an inference and serving engine for large language models. Prior to 0.30.0, structured-output request failures can escape request-scoped validation and reach the EngineCore fatal-error path. A per-request backend mismatch can re-raise a grammar compilation exception, padding produced by the ngram_gpu speculative-decoding mode can pass a negative token to guidance validation, and the Rust frontend can admit empty structured-output values that the Python frontend rejects, allowing ordinary constrained-generation requests to terminate the shared engine. This issue is fixed in version 0.30.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-20","CWE-248","CWE-755"],"references":["https://github.com/vllm-project/vllm/commit/c55e15a44ec4127832d4a86928a356fdd9e68dbd","https://github.com/vllm-project/vllm/pull/51450","https://github.com/vllm-project/vllm/releases/tag/v0.30.0","https://github.com/vllm-project/vllm/security/advisories/GHSA-85xf-c7hm-whqw"],"products":["vllm:vllm"],"source":"nvd","synced_at":"2026-10-19T22:57:46.668721662+00:00"},"epss":{"cve":"CVE-2026-105757","score":0.00314,"percentile":0.24049,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-85xf-c7hm-whqw","url":"https://osv.dev/vulnerability/GHSA-85xf-c7hm-whqw","summary":"vLLM: Structured-output request errors escape the request boundary and terminate the shared EngineCore — engine-fatal denial of service (3 sites)","modified":"2026-10-08T10:10:59.490277068Z","packages":[{"ecosystem":"PyPI","name":"vllm","purl":"pkg:pypi/vllm","ranges":["<0.30.0"],"fixed":["0.30.0"]}]},{"id":"PYSEC-2026-4199","url":"https://osv.dev/vulnerability/PYSEC-2026-4199","summary":"","modified":"2026-10-08T10:00:02.850478893Z","packages":[{"ecosystem":"PyPI","name":"vllm","purl":"pkg:pypi/vllm","ranges":["<0.30.0"],"fixed":["0.30.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}