Resource exhaustion in Vllm
CVE-2026-78684
vLLM before 0.27.0 fails to properly classify DeepStream as a GPU backend and omits pixel-limit enforcement in its decode path. Unauthenticated attackers can activate DeepStream at request time to initialize the process-wide GPU decode pool and submit video that bypasses resource controls, causing partial denial of service for concurrent requests.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.006 (47.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.006 · change: +0.003
Affected products
Weakness classification (CWE)
References
- github.com/vllm-project/vllm/security/advisories/GHSA-cqm8-jxg6-fqfq (vendor-advisory, Vendor Advisory)
- github.com/vllm-project/vllm/commit/e23b19309b8705b21c3b3ff4129c9974ba15a419 (Patch, patch)
- www.vulncheck.com/advisories/vllm-before-denial-of-service-via-deepstream-backe… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-78684?
- CVE-2026-78684 is a medium-severity vulnerability in Vllm, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2026-08-25.
- How severe is CVE-2026-78684?
- Medium severity. CVSS v3 base score is 5.3 out of 10.