Vulnerability in Vllm
CVE-2026-54232
vLLM is an inference and serving engine for large language models (LLMs). Prior to 0.22.1, the vLLM Dockerfile is vulnerable to a dependency confusion attack through the flashinfer-jit-cache package. The package is installed from a custom index (flashinfer.ai/whl/) using --extra-index-url, but the package name was not registered on PyPI, and UV_INDEX_STRATEGY="unsafe-best-match" is set globally. An attacker who registers flashinfer-jit-cache on PyPI with version 0.6.11.post2 can execute arbitrary code as root during the Docker build and backdoor every resulting container image, enabling exfiltration of all user prompts, API credentials, and model data from production vLLM deployments This vulnerability is fixed in 0.22.1.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (44.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Vllm
- Vllm-Project Vllm — versions < 0.22.1
Weakness classification (CWE)
References
- github.com/vllm-project/vllm/security/advisories/GHSA-jrf6-vqxq-pjv2 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-54232?
- CVE-2026-54232 is a high-severity vulnerability in Vllm, classified under Uncontrolled Search Path Element. CVSS score: 8.8/10. Published 2026-06-22.
- How severe is CVE-2026-54232?
- High severity. CVSS v3 base score is 8.8 out of 10.