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Vllm CVE-2026-55514

| EUVDEUVD-2026-41925 HIGH
Reachable Assertion (CWE-617)
2026-07-06 GitHub_M GHSA-33cg-gxv8-3p8g PYSEC-2026-2303
7.1
CVSS 4.0 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
7.1 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Red Hat
6.5 MEDIUM
qualitative

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

2
Patch available
Jul 06, 2026 - 22:02 EUVD
Analysis Generated
Jul 06, 2026 - 21:06 vuln.today

Blast Radius

ecosystem impact
† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth
  • 4 pypi packages depend on vllm (4 direct, 0 indirect)

Ecosystem-wide dependent count for version 0.12.0.

DescriptionCVE.org

vLLM is a library for LLM inference and serving. From 0.12.0 to before 0.24.0, sending a pure prompt embeds payload in a /v1/completions request with a model using M-RoPE causes EngineCore to fail an assertion and fatally crash, shutting down the entire server application. Any remote user who is authorized to make a /v1/completions request can make such a request and induce a crash. This issue is fixed in version 0.24.0.

AnalysisAI

Denial of service in vLLM 0.12.0 through 0.23.x lets any authorized API caller crash the entire inference server by submitting a pure prompt-embeddings payload to the /v1/completions endpoint when a model using M-RoPE (multimodal rotary position embedding) is loaded. The malformed request trips a reachable assertion in the EngineCore process, which terminates the whole server rather than rejecting the single request. There is no public exploit identified at time of analysis and it is not listed in CISA KEV; the flaw is fixed in vLLM 0.24.0.

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CVE-2026-55514 vulnerability details – vuln.today

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