Vulnerability in Vllm
CVE-2026-54233
vLLM is an inference and serving engine for large language models (LLMs). Prior to 0.23.1rc0, vLLM's /v1/audio/transcriptions endpoint limits compressed upload size but not decoded PCM output. A 25MB OPUS file expands to ~14.9GB of float32 PCM at decode time. This vulnerability is fixed in 0.23.1rc0.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (34.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Vllm
- Vllm-Project Vllm — versions < 0.23.1rc0
Weakness classification (CWE)
References
- github.com/vllm-project/vllm/security/advisories/GHSA-6pr9-rp53-2pmc (Third Party Advisory)
- github.com/vllm-project/vllm/pull/44970 (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2026-54233?
- CVE-2026-54233 is a medium-severity vulnerability in Vllm, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 6.5/10. Published 2026-06-22.
- How severe is CVE-2026-54233?
- Medium severity. CVSS v3 base score is 6.5 out of 10.