CVE-2026-103241

vllm-project vLLM Gemma4UnifiedParser gemma4.rs denial of service

State: Published
Severity: 6.9 Medium
Published: Sep 30, 2026
Updated: Oct 2, 2026
Reserved: Sep 30, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P	VulDB
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C	VulDB
3.0	5.3 Medium	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C	VulDB
2.0	5.0 Medium	AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C	VulDB

Weaknesses

CWE-404 Denial of Service

Affected Products

Product	Versions
vLLMvllm-project	0.1Affected 0.2Affected 0.3Affected 0.4Affected 0.5Affected 0.6Affected 0.7Affected 0.8Affected 0.9Affected 0.10Affected 0.11Affected 0.12Affected 0.13Affected 0.14Affected 0.15Affected 0.16Affected 0.17Affected 0.18Affected 0.19Affected 0.20Affected 0.21Affected 0.22Affected 0.23Affected 0.24Affected 0.25Affected and 2 more versions

References

VDB-411965 | vllm-project vLLM Gemma4UnifiedParser gemma4.rs denial of servicevdb-entry
VDB-411965 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
CVE-2026-103241 | CVE Analysis and Reportthird-party-advisory
Submit #956250 | vLLM Project vLLM v0.26.0 Denial of Servicethird-party-advisory
https://github.com/vllm-project/vllm/issues/50927issue-tracking
https://github.com/vllm-project/vllm/pull/54303issue-trackingpatch
https://gist.github.com/Yunzez/8e98d656aa667095b513161eb056d28eexploit
https://github.com/vllm-project/vllm/commit/3439bad37e68ba9755a46f4f6b44a4aeaf1f60a9patch
https://github.com/vllm-project/vllm/releases/tag/v0.29.1rc0patch
https://github.com/vllm-project/vllm/product

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.