CVE-2026-55514: 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 En

mediumCVSS 6.5CVE-2026-55514

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.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 6.5
Published: 2026-07-06
Last updated: 2026-07-07
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-55514

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-555140.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 29% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-55514	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[NEW] [medium] vllm: Multiple vulnerabilities allow Denial of Servicecert-bund

Recent advisories for vLLM is a

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

high[UPDATE] [high] vllm: Vulnerability allows code executioncert-bund · 2026-07-10
medium[NEW] [medium] vllm: Multiple vulnerabilities allow Denial of Servicecert-bund · 2026-07-07
high[UPDATE] [high] vllm: Vulnerability allows bypassing security measurescert-bund · 2026-07-07
medium[UPDATE] [medium] vllm: Vulnerability allows code executioncert-bund · 2026-07-07
medium[UPDATE] [medium] vllm: Multiple vulnerabilitiescert-bund · 2026-07-07
medium[UPDATE] [medium] vllm: Multiple vulnerabilitiescert-bund · 2026-07-07