CVE-2026-100652 vLLM 0.22.0 through 0.23.0 Denial of Service via stop_token_ids

What is CVE-2026-100652?

CVE-2026-100652 is a high-severity denial of service vulnerability in Vllm Vllm, published on 26 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

vLLM versions 0.22.0 through 0.23.0 fail to validate stop_token_ids against vocabulary bounds in Rust HTTP and gRPC frontends, allowing out-of-vocabulary token IDs to reach MinTokensLogitsProcessor. Attackers can submit requests with min_tokens greater than zero and out-of-vocabulary stop_token_ids to trigger CUDA tensor indexing failures that leave EngineCore in a fatal state requiring service restart.

Weakness: CWE-20

Which versions are affected by CVE-2026-100652?

1 open source package ship an affected version, including vllm. It affects 1 product.

Products include Vllm Vllm.

How do I fix CVE-2026-100652?

Upgrade vllm to 0.24.0 or later.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-100652 being exploited?

There is no known exploitation of CVE-2026-100652 in the wild and no public exploit code.

Other vulnerabilities in Vllm Vllm

• CVE-2025-32444 vLLM Vulnerable to Remote Code Execution via Mooncake Integration Critical 10.0
• CVE-2026-22778 vLLM leaks a heap address when PIL throws an error Critical 9.8
• CVE-2025-47277 vLLM Allows Remote Code Execution via PyNcclPipe Communication Service Critical 9.8
• CVE-2024-11041 Remote Code Execution in vllm-project/vllm Critical 9.8
• CVE-2026-48746 vLLM: OpenAI auth bypass Critical 9.1

All Vllm Vllm vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• GitHub advisory
• How this page is made

Also known as GHSA-gxcm-7c4h-f56c, GHSA-qff2-492f-9fm4, MINI-7c86-3q7w-m4p7, MINI-7jrf-8pxp-f93g, PYSEC-2026-4185.