CVE-2026-55514
Published:July 06, 2026
Updated:August 04, 2026
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.
Affected Packages
vllm (CONDA):
Affected version(s) >=0.19.1 <0.24.0Fix Suggestion:
Update to version 0.24.0https://github.com/vllm-project/vllm.git (GITHUB):
Affected version(s) >=v0.12.0 <v0.24.0Fix Suggestion:
Update to version v0.24.0vllm (PYTHON):
Affected version(s) >=0.12.0 <0.24.0Fix Suggestion:
Update to version 0.24.0Related Resources (8)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Reachable Assertion
EPSS
Base Score:
0.37