TI-2026-80196 Aliases CVE-2026-116178 GHSA-w9hx-wr9v-56wv

Denial of service in vLLM via inconsistent multimodal inputs

LOW 36CWE-20Published 2026-10-25 · Updated 2026-10-26

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Attack requirements: Present
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: Partial Red Hat: 3 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

vLLM from 0.20.0 before 0.30.0 contains a denial of service vulnerability caused by improper input validation (CWE-20). A remote attacker without privileges or user interaction can crash the engine by sending inconsistent multimodal metadata to the disaggregated /inference/v1/generate endpoint. The inconsistent metadata produces a negative text span during Qwen2.5-VL position construction.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

vLLM from 0.20.0 before 0.30.0 contains a denial of service vulnerability that allows remote attackers to crash the engine by sending inconsistent multimodal metadata to the disaggregated /inference/v1/generate endpoint. Attackers can replay a valid multimodal item with repeated or overlapping mm_placeholders ranges or mismatched kwargs_data and mm_hashes lists, producing a negative text span in Qwen2.5-VL position construction that terminates the engine.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00331 26th percentileScored 2026-11-07

Fix Partial vllm (vllm-project): 0.30.0Red Hat: 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
vllm-project	vllm	0.20.0 to before 0.30.0	0.30.0	Patch available	CNA

vllm Vendorvllm-project Affected 0.20.0 to before 0.30.0 Fixed in 0.30.0 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:vllm:vllm::::::::	0.20.0 to before 0.30.0	Vulnerable	vLLM

cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:* Versions 0.20.0 to before 0.30.0 Vulnerable ·vLLM

Remediation

Upgrade vLLM to version 0.30.0. Red Hat lists Red Hat AI Inference Server, Red Hat Enterprise Linux AI (RHEL AI) 3 and Red Hat OpenShift AI (RHOAI) as affected, with no fix plan available.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Fix · CNA vllm (vllm-project) Fixed in 0.30.0

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat AI Inference Server	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3	Affected	No fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)	Affected	No fix yet: Fix deferred

Timeline

2026-10-25 Threatist record created from CVE-2026-116178
2026-10-25 Affected versions changed · Red Hat
2026-10-25 CVSS score added · Red Hat
2026-10-26 CISA SSVC decision points changed
2026-10-26 Priority changed: MEDIUM → LOW
2026-10-27 Alias added: GHSA-w9hx-wr9v-56wv
2026-10-28 CVSS score added · NVD

References

Patch 1

GitHub Security Advisory (GHSA-34qw-q2h2-jp3m)

TI-2024-10229 Remote Code Execution in vllm-project/vllm CVSS 3.0CRITICAL 9.8
TI-2024-08404 Remote Code Execution in vllm-project/vllm CVSS 3.1CRITICAL 9.8
TI-2026-36017 vLLM: OpenAI auth bypass CVSS 3.1CRITICAL 9.1
TI-2026-63056 vLLM before 0.28.0 Denial of Service via negative token ID CVSS 4.0HIGH 8.7
TI-2026-04308 Hardcoded trust_remote_code=True in vllm-project/vllm Bypasses User Security Control CVSS 3.0HIGH 8.8
TI-2026-39137 vLLM: Remote DoS in vLLM via Invalid Recovered Token Reinjection CVSS 3.1HIGH 7.5

See all 124 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences