Vulnerability in Vllm-Project Vllm
CVE-2026-93436
vLLM through 0.29.0 fails to properly clean up decode-side metadata for rejected inference requests in prefill/decode disaggregated deployments. Remote attackers can submit requests with max_tokens=0 to exhaust decode-worker memory without bound until the worker restarts.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (issue-tracking, patch)
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-93436?
- CVE-2026-93436 is a high-severity vulnerability in Vllm-Project Vllm, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 7.5/10. Published 2026-09-17.
- How severe is CVE-2026-93436?
- High severity. CVSS v3 base score is 7.5 out of 10.