Vulnerability in Vllm
CVE-2026-93592
vLLM versions before 0.28.0 fail to validate the lower bound of token IDs in the /v1/embeddings and /pooling endpoints, allowing unauthenticated attackers to crash the engine by submitting negative token IDs. A single request with a negative token ID triggers a CUDA device-side assertion that poisons the GPU context, causing all subsequent requests to fail until the process restarts.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (45.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/vllm-project/vllm/security/advisories/GHSA-25q3-v2hm-8vpf (Exploit, vendor-advisory, Patch, Mitigation, Vendor Advisory)
- www.vulncheck.com/advisories/vllm-before-0.28.0-denial-of-service-via-negative-… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-93592?
- CVE-2026-93592 is a high-severity vulnerability in Vllm, classified under Improper Validation of Array Index. CVSS score: 7.5/10. Published 2026-09-18.
- How severe is CVE-2026-93592?
- High severity. CVSS v3 base score is 7.5 out of 10.