CVE-2026-78684

MEDIUM 5.3

vLLM before 0.27.0 Denial of Service via DeepStream Backend

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-400
Vendor	vllm-project
Product	vllm
Published	Aug 25, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

vllm-project / vllm

0 < 0.27.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 Charles-know jperezdealgaba DarkLight1337