CVE-2026-78684mediumCWE-400

vLLM before 0.27.0 Denial of Service via DeepStream Backend

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.9epss 0.6%

exploitation probability

0.6%top 55% of all CVEs

observed exploitation

nono source reports it

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Affected products

vllm-project · vllm

References

https://github.com/vllm-project/vllm/commit/e23b19309b8705b21c3b3ff4129c9974ba15a419 https://github.com/vllm-project/vllm/security/advisories/GHSA-cqm8-jxg6-fqfq https://www.vulncheck.com/advisories/vllm-before-denial-of-service-via-deepstream-backend