CVE-2026-103241

highpriority · track · 30EPSS 0.007 · 53 %ileUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.71% (53rd) EPSS

CVSS 7.5 · high

Is it mine?

2 products

Check your exposure

Who says so?

2 sources

nvd · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 2.7–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lprimary · cna@vuldb.comexploitability 3.9 · impact 1.4

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Psecondary · cna@vuldb.comexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v4.05.5mediumCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · cna@vuldb.com

v4.02.7lowCVSS: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:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-404US

affected products (2)

Products and version ranges known to be affected.

vllm vllm≤ 0.26.0nvdUScpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*
PyPI vllm< 0.27.0osvUSpkg:pypi/vllm

advisories (1)

Vendor and ecosystem advisories describing this.

PYSEC-2026-41862026-09-30vendor · osvUS
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.

sources

Which sources assert this record, and when.

nvd osv NVD CVE.org MITRE

published 2026-09-30modified 2026-10-06

references (10) nvd

External citations — patches, advisories, analysis.

https://gist.github.com/Yunzez/8e98d656aa667095b513161eb056d28eProduct
https://github.com/vllm-project/vllm/Product
https://github.com/vllm-project/vllm/commit/3439bad37e68ba9755a46f4f6b44a4aeaf1f60a9Patch
https://github.com/vllm-project/vllm/issues/50927Issue TrackingPatch
https://github.com/vllm-project/vllm/pull/54303Issue TrackingPatch
https://github.com/vllm-project/vllm/releases/tag/v0.29.1rc0Release Notes
https://vuldb.com/cve/CVE-2026-103241Third Party AdvisoryVDB Entry
https://vuldb.com/submit/956250Third Party AdvisoryVDB Entry

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