Improper Validation of Array Index in vLLM - CVE-2026-93592
Published: September 7, 2026 / Updated: September 22, 2026
Vulnerability identifier: #VU147264
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93592
CWE-ID: CWE-129
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper validation of array indices in InputProcessor._validate_model_input for the /v1/embeddings and /pooling endpoints when processing token-id input containing a negative value. A remote attacker can send a request containing a negative token id to cause a denial of service.
Affected software
vLLM
How to mitigate CVE-2026-93592
Install security update from vendor's website.
vLLM - update to 0.28.0