vllm-project vLLM up to 0.26.0 Gemma4UnifiedParser gemma4.rs denial of service

Summaryinfo

A vulnerability, which was classified as problematic, has been found in vllm-project vLLM up to 0.26.0. This issue affects some unknown processing of the file rust/src/parser/src/unified/gemma4.rs of the component Gemma4UnifiedParser. The manipulation leads to denial of service. This vulnerability is referenced as CVE-2026-103241. Remote exploitation of the attack is possible. Furthermore, an exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in vllm-project vLLM up to 0.26.0. It has been rated as problematic. This issue affects an unknown functionality of the file rust/src/parser/src/unified/gemma4.rs of the component Gemma4UnifiedParser. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-103241. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The exploit is available at gist.github.com. It is declared as proof-of-concept.

Upgrading to version 0.29.1rc0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 3439bad37e68ba9755a46f4f6b44a4aeaf1f60a9 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Project Management Software

Vendor

• vllm-project

Name

• vLLM

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26.0

License

• open-source

Website

• Product: https://github.com/vllm-project/vllm/

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Submitinfo

Accepted

• Submit #956250: vLLM Project vLLM v0.26.0 Denial of Service (by Zyz3366)

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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