CVE-2026-116181

Impact

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.

Affected products

Weakness classification

References

• NVD record
• CVE.org record
• 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