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CVE-2026-103241

5.3 · MEDIUM

A flaw has been found in vllm-project vLLM up to 0.26.0.

Published Sep 30, 2026vllmCWE-404EPSS 0.71%

Overview

CVE-2026-103241 is a medium-severity vulnerability affecting vllm vllm. It was published on September 30, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A flaw has been found in vllm-project vLLM up to 0.26.0. This vulnerability affects unknown code of the file rust/src/parser/src/unified/gemma4.rs of the component Gemma4UnifiedParser. Executing a manipulation can lead to denial of service. The attack may be launched remotely. The exploit has been published and may be used. Upgrading to version 0.29.1rc0 is able to resolve this issue. This patch is called 3439bad37e68ba9755a46f4f6b44a4aeaf1f60a9. Upgrading the affected component is advised.

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
vllmvllm0Affected

References

GitHubgist.github.com/Yunzez/8e98d656aa667095b513161eb056d28eGitHubgithub.com/vllm-project/vllm/GitHubgithub.com/vllm-project/vllm/commit/3439bad37e68ba9755a46f4f6b44a4aeaf1f60a9GitHubgithub.com/vllm-project/vllm/issues/50927GitHubgithub.com/vllm-project/vllm/pull/54303GitHubgithub.com/vllm-project/vllm/releases/tag/v0.29.1rc0Refvuldb.com/cve/CVE-2026-103241Refvuldb.com/submit/956250Refvuldb.com/vuln/411965Refvuldb.com/vuln/411965/cti

How CyberStrike helps

Frequently asked questions

What is CVE-2026-103241?

CVE-2026-103241 is a medium-severity vulnerability affecting vllm vllm. It was published on September 30, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-103241?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-103241?

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-2026-103241?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-103241 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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