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CVE-2026-105757

6.5 · MEDIUM

vLLM is an inference and serving engine for large language models.

Published Oct 5, 2026vllmCWE-20EPSS 0.31%

Overview

CVE-2026-105757 is a medium-severity vulnerability affecting vllm vllm. It was published on October 5, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from vllm. Update vllm to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
vllmvllm>= 0, < 0.30.0Affected

References

GitHubgithub.com/vllm-project/vllm/commit/c55e15a44ec4127832d4a86928a356fdd9e68dbdGitHubgithub.com/vllm-project/vllm/pull/51450GitHubgithub.com/vllm-project/vllm/releases/tag/v0.30.0GitHubgithub.com/vllm-project/vllm/security/advisories/GHSA-85xf-c7hm-whqw

How CyberStrike helps

Frequently asked questions

What is CVE-2026-105757?

CVE-2026-105757 is a medium-severity vulnerability affecting vllm vllm. It was published on October 5, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-105757?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-105757?

Check the references section for vendor advisories and patches from vllm. Update vllm to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-105757?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-105757 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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