CVE-2026-116173vLLM 0.22.0 before 0.24.0 Denial of Service via gRPC output_candidates.token_ids

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.

8.2 HIGHEPSS 0.33%Not in KEVNVD: Analyzed

Last updated: 2026-10-28 15:43 UTC

OverviewCVSS details

8.2HIGHCVSS 4.0

Score source: VulnCheck (CNA)
NVD status: Analyzed
Published: Oct 25, 2026
Assigner: VulnCheck

Affected

vllm (vllm-project)

Versions: 0.22.0 before 0.24.0
Fixed in: 0.24.0

Exploitation

Public exploit: None listed
CISA KEV: Not listed
KEV due date: —
SSVC: Exploitation none · Automatable no · Impact partial

EPSS · FIRST, scored Nov 7

0.33%chance of exploitation in 30 days

Higher than 27.49% of CVEs

CVSS 4.0 · VulnCheck (CNA)

8.2High

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Attack vector: Network
Attack complexity: High
Attack requirements: Present
Privileges required: None
User interaction: None
Confidentiality impact: None
Integrity impact: None
Availability impact: High
Confidentiality (other systems): None
Integrity (other systems): None
Availability (other systems): None

CVSS 3.1 · NVD

7.5High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

CVSS 3.1 · VulnCheck (CNA)

5.9Medium

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
8.2	HIGH	4.0VulnCheck (CNA)	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5	HIGH	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.9	MEDIUM	3.1VulnCheck (CNA)	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CVE ID: CVE-2026-116173
Status: Analyzed
Assigner (CNA): VulnCheck
Published: Oct 25, 2026
Last modified: 2026-10-28 15:43 UTC
Weaknesses: CWE-20 · Improper Input Validation

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 08:58 UTC.