CVE-2026-105757 - vLLM: Structured-output request errors escape the request boundary and terminate the shared EngineCore — engine-fatal denial of service (3 sites)

CVE-2026-105757 - vLLM: Structured-output request errors escape the request boundary and terminate the shared EngineCore — engine-fatal denial of service (3 sites)

https://cvefeed.io/rssfeed/latest.atom / Tue, 10/06/2026 - 01:51
CVE ID :CVE-2026-105757
Published : Oct. 5, 2026, 11:17 p.m. | 28 minutes ago
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.
Severity: 6.5 | MEDIUM
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