| Component | vLLM |
| Severity | medium (CVSS 5.9) |
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Published (NVD) | 2026-10-25 |
| Affected versions | >= 0.22.0, < 0.24.0 from the CVE Program record written by the CNA that assigned the CVE |
| Fixed in | 0.24.0 |
| Weakness | CWE-20 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade vLLM to
0.24.0or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-116173
- https://github.com/vllm-project/vllm/security/advisories/GHSA-6pgw-f3pv-4h8q
- https://www.vulncheck.com/advisories/vllm-0.22.0-before-0.24.0-denial-of-service-via-grpc-output-candidates-token-ids