Input validation error in Next.js - CVE-2026-96889
Published: October 15, 2026
Vulnerability identifier: #VU155800
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-2026-96889
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 code.
The vulnerability exists due to a memory-related flaw in an upstream library used by the Next.js Image Optimization API when processing SVG files. A remote attacker can supply SVG files for processing to execute arbitrary code.
Exploitation requires Next.js to run on glibc-based Linux.
Affected software
Next.js
How to mitigate CVE-2026-96889
Install security update from vendor's website.
Next.js - addressed in versions 15.5.28, 16.4.1