TI-2026-80191 Aliases CVE-2026-116173 GHSA-7r5r-rrjg-pf3c

Denial of service in vLLM via crafted gRPC logprob token requests

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 0.22.0 before 0.24.0 contains a denial of service flaw in its Rust gRPC frontend, where improper input validation lets logprob_token_ids limits be bypassed (CWE-20). A remote unauthenticated attacker can send Generate or GenerateStream requests with output_logprobs enabled and more than 128 output_candidates.token_ids. This triggers a fatal sampler exception that crashes EngineCore.

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

Description from the CNA

vLLM from 0.22.0 before 0.24.0 contains a denial of service vulnerability that allows remote attackers to terminate EngineCore by bypassing logprob_token_ids limits in the Rust gRPC frontend. Attackers can send Generate or GenerateStream requests with output_logprobs enabled and more than 128 output_candidates.token_ids, triggering a fatal sampler exception that crashes the engine.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00339 27th percentileScored 2026-11-07

Fix Partial vllm (vllm-project): 0.24.0Red 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	0.22.0 to before 0.24.0	0.24.0	Patch available	CNA

vllm Vendorvllm-project Affected 0.22.0 to before 0.24.0 Fixed in 0.24.0 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:vllm:vllm::::::::	0.22.0 to before 0.24.0	Vulnerable	vLLM

cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:* Versions 0.22.0 to before 0.24.0 Vulnerable ·vLLM

Remediation

Upgrade vLLM to version 0.24.0. Red Hat lists no available fix plan for Red Hat AI Inference Server, Red Hat Enterprise Linux AI (RHEL AI) 3, or Red Hat OpenShift AI (RHOAI).

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

Fix · CNA vllm (vllm-project) Fixed in 0.24.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-10-25
vllm-project vllm 0.24.0
5 records Highest priority Priority MEDIUM 1 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2026-80194 Server-side request forgery in vLLM P2pNcclConnector via X-Request-IdPriority MEDIUM 44
- TI-2026-80190 Denial of service in vLLM Rust gRPC converter via top_nPriority LOW 36
- TI-2026-80192 Denial of service in vLLM via Rust gRPC Generate requestsPriority LOW 35
Show all 5 records →

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-2026-116173
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-7r5r-rrjg-pf3c
2026-10-28 CVSS score added · NVD

References

Advisory 1

GitHub Security Advisory (GHSA-6pgw-f3pv-4h8q)

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

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