vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-55514

vLLM denial of service via prompt embeds on M-RoPE models

MEDIUM
6.5
CVSS Score
Published: July 6, 2026 at 08:07 PM UTC
Updated: October 25, 2026 at 08:10 PM UTC
1 product affected across 1 vendorvLLM

Using vllm by vllm-project?

Get instant alerts when new vulnerabilities affect vllm - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM6.5
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

vLLM· Vllm
95%
0.12.0 ≤ v < 0.24.0
Affected range stops below 0.24.0, so it looks safe — our inference, not a vendor statement

References (4)

x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://github.com/vllm-project/vllm/security/advisories/GHSA-33cg-gxv8-3p8g
x_refsource_MISCIssue TrackingPatch
Source: cverecord
https://github.com/vllm-project/vllm/pull/45252
x_refsource_MISCPatch
Source: cverecord
https://github.com/vllm-project/vllm/commit/470229c37efaf69c86e8bc97482b0b1ff7551c65
x_refsource_MISCRelease Notes
Source: cverecord
https://github.com/vllm-project/vllm/releases/tag/v0.24.0

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-617

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card