CVE-2026-116181
vLLM from 0.20.1 before 0.29.0 contains an improper input validation vulnerability that allows remote attackers to crash the engine by supplying out-of-vocabulary stop_token_ids. Attackers can send OpenAI chat, completion, generate, or batch requests with invalid IDs to terminate the engine or write outside the V2 runner's logits buffer.
- Score
- CVSS 4.0 7.1 High
- Status
- Analyzed - disclosure@vulncheck.com
- Published
- 2026-10-25
- Last modified
- 2026-10-28
- Weaknesses
- CWE-129
Affected products
References
- https://github.com/vllm-project/vllm/security/advisories/GHSA-w9r6-29q4-pvpr
- https://www.vulncheck.com/advisories/vllm-0.20.1-before-0.29.0-dos-and-gpu-out-of-bounds-write-via-stop-token-ids
