High 7.1Published Jul 6, 2026

CVE-2026-55514vLLM denial of service via prompt embeds on M-RoPE models

Updated under an hour ago (Oct 27, 2026, 4:10 PM ET)

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It affects vllm-project vllm and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for vllm-project vllm

Exploited in the last 30 days

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.

CVSS: 7.1 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-617
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

vllm-project vllm vllm_project:vllm (from the name)	from 0.12.0, < 0.24.0	CNA record
vllm vllm vllm:vllm	from 0.12.0 before 0.24.0	NVD

References

References

https://github.com/vllm-project/vllm/security/advisories/GHSA-33cg-gxv8-3p8g	x-refsource-confirm, vendor-advisory
https://github.com/vllm-project/vllm/pull/45252	x-refsource-misc, issue-tracking, patch
https://github.com/vllm-project/vllm/commit/470229c37efaf69c86e8bc97482b0b1ff7551c65	x-refsource-misc, patch
https://github.com/vllm-project/vllm/releases/tag/v0.24.0	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.