Improper input validation in Vllm-Project Vllm
CVE-2026-105756
vLLM is an inference and serving engine for large language models. Prior to 0.30.0, OpenAI-compatible request models accept a non-empty cache_salt value without enforcing the character and length restrictions required by the IPCCacheServerKey consumer in LMCache-MP. On deployments using the LMCache-MP connector, a salt that contains a forbidden character or exceeds the permitted length can raise an uncaught ValueError during scheduler cache lookup, causing EngineCore to terminate and denying service to all concurrent users. This issue is fixed in version 0.30.0.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
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
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Vllm-Project Vllm — versions < 0.30.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-105756?
- CVE-2026-105756 is a medium-severity vulnerability in Vllm-Project Vllm, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2026-10-05.
- How severe is CVE-2026-105756?
- Medium severity. CVSS v3 base score is 6.5 out of 10.