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.
Metrics
Affected Vendors & Products
References
History
Thu, 08 Oct 2026 01:45:00 +0000
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| First Time appeared |
Vllm
Vllm vllm |
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| CPEs | cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Vllm
Vllm vllm |
Tue, 06 Oct 2026 14:30:00 +0000
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| Metrics |
ssvc
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Tue, 06 Oct 2026 12:15:00 +0000
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| Metrics |
threat_severity
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threat_severity
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Tue, 06 Oct 2026 01:15:00 +0000
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| First Time appeared |
Vllm-project
Vllm-project vllm |
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| Vendors & Products |
Vllm-project
Vllm-project vllm |
Mon, 05 Oct 2026 23:00:00 +0000
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| 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. | |
| Title | vLLM: Structured-output request errors escape the request boundary and terminate the shared EngineCore — engine-fatal denial of service (3 sites) | |
| Weaknesses | CWE-20 CWE-248 CWE-755 |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-10-05T22:52:05.000Z
Updated: 2026-10-06T13:20:25.829Z
Reserved: 2026-10-05T19:11:07.947Z
Link: CVE-2026-105757
Updated: 2026-10-06T13:20:18.839Z
Status : Analyzed
Published: 2026-10-05T23:17:02.467
Modified: 2026-10-08T01:28:00.630
Link: CVE-2026-105757