Input validation error in vLLM - CVE-2026-115915
Published: October 21, 2026 / Updated: November 2, 2026
Vulnerability identifier: #VU156675
CSH Severity: High
CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-115915
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary commands or cause a denial of service through vulnerable image-processing dependencies.
The vulnerability exists due to improper input validation in vLLM's ImageMediaIO when selecting a decoder for untrusted image bytes. A remote attacker can submit EPS content labeled image/png to reach Pillow's EPS processing path regardless of the declared MIME type, enabling command execution with a vulnerable host Ghostscript build or exhaustion of media-loading workers with an affected Pillow version.
Affected software
vLLM
How to mitigate CVE-2026-115915
Install security update from vendor's website.
vLLM - update to 0.32.0