Vulnerability in Vllm-Project Vllm
CVE-2026-116180
vLLM from 0.8.5 before 0.31.0 has a denial of service flaw. LogprobsTensors.empty_cpu() in vllm/v1/outputs.py allocates an uninitialized int32 tensor, and the V1 model runner leaves prompt positions reported as computed by a KV connector unwritten. A client sharing the engine can send prompt_logprobs (or echo with logprobs) against a connector-cached prefix, making tokenizer decode raise OverflowError, which crashes EngineCore and drops all co-tenant requests.
Published .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/vllm-project/vllm/security/advisories/GHSA-rhcx-5729-88vg (vendor-advisory)
- www.vulncheck.com/advisories/vllm-from-0.8.5-before-0.31.0-cross-tenant-dos-via… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116180?
- CVE-2026-116180 is a high-severity vulnerability in Vllm-Project Vllm, classified under Use of Uninitialized Resource. CVSS score: 7.7/10. Published 2026-10-25.
- How severe is CVE-2026-116180?
- High severity. CVSS v3 base score is 7.7 out of 10.