CVE catalog
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 EngineCore to fail an
- Severity
- High · CVSS 7.1
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 - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.66% · Oct 25, 2026
A flaw was found in vLLM, a library for Large Language Model (LLM) inference and serving. A remote attacker, authorized to make a /v1/completions request, can send a specially crafted prompt embeds payload. This action causes the EngineCore to fail an assertion and fatally crash, leading to a Denial of Service (DoS) for the entire server application. vllm: vLLM: Denial of Service via crafted prompt in /v1/completions request This Moderate-impact flaw in vLLM, as used in Red Hat AI Inference Server, Red Hat OpenShift AI, and Red Hat Enterprise Linux AI, allows a remote, authenticated attacker to trigger a denial of service. By sending a specially crafted prompt embeds payload to the `/v1/completions` endpoint with a model utilizing M-RoPE, the attacker can cause the EngineCore to crash, leading to the unavailability of the server application. This issue requires prior authorization to make requests to the `/v1/completions` endpoint. The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | vllm | Not reported | 0.24.0 | fixed |
| Pip | vllm | Not reported | 0.24.0 | fixed |
| Cpe | vllm | Not reported | 0.24.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | vllm | cpe | Not reported | 0.24.0 | Not reported | Not reported | Not reported |
| Pip | vllm | pip | Not reported | 0.24.0 | Not reported | Not reported | Not reported |
| Cpe | vllm | cpe | Not reported | 0.24.0 | Not reported | NVD-CVE-2026-55514 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://github.com/advisories/GHSA-33cg-gxv8-3p8g]
- [https://github.com/vllm-project/vllm/commit/470229c37efaf69c86e8bc97482b0b1ff7551c65]
- [https://github.com/vllm-project/vllm/pull/45252]
- [https://github.com/vllm-project/vllm/releases/tag/v0.24.0]
- [https://github.com/vllm-project/vllm/security/advisories/GHSA-33cg-gxv8-3p8g]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-55514]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55514.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2176.json]
[CERT-Bund public advisories] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX]