Medium severity · published Oct 25, 2026
CVE-2026-116173
vLLM 0.22.0 before 0.24.0 Denial of Service via gRPC output_candidates.token_ids
New
5.9
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VL
vllm · vllm-project
0.22.0 before 0.24.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116173
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116173
github.com
https://github.com/vllm-project/vllm/security/advisories/GHSA-6pgw-f3pv-4h8q
www.vulncheck.com
https://www.vulncheck.com/advisories/vllm-0.22.0-before-0.24.0-denial-of-service-via-grpc-output-candidates-token-ids
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