Packages / next / Security

CriticalVulnerabilityGHSA-2xp9-vwfh-vxw4Published 8 Sep 2026

Next.js: Unauthenticated Remote Code Execution in Image Optimization API when AVIF files are used

Affected releases · next

  • 16.x16.0.0 – 16.3.2Fixed in 16.3.3
  • 15.x15.0.0 – 15.5.23Fixed in 15.5.24
  • 14.x14.0.0 – 14.2.35No fix on this line yet
  • 13.x and older10.0.0 – 13.5.11No fix, no longer updated

On 16.x, the newest line:

npm install next@16.3.3
16.x

  1. Affected

    16.0.0 – 16.3.2

    36 releases

  2. Fixed

    16.3.3 – 16.4.2

    9 releases, latest

15.x

  1. Affected

    15.0.0 – 15.5.23

    77 releases

  2. Fixed

    15.5.24 – 15.5.28

    5 releases

14.x

  1. Affected

    14.0.0 – 14.2.35

    46 releases

13.x

  1. Affected

    13.0.0 – 13.5.11

    56 releases

12.x

  1. Affected

    12.0.0 – 12.3.7

    33 releases

11.x

  1. Affected

    11.0.0 – 11.1.4

    7 releases

10.x

  1. Affected

    10.0.0 – 10.2.3

    18 releases

423 stable releases of next, oldest to newest, one row per major.

Is your project affected?

Paste your package.json, or type the range you declare for next. It is read in your browser and sent nowhere.

What happens

A vulnerability in the underlying libheif library used by sharp which Next.js uses for image optimization can lead to remote code execution when AVIF files are optimized.

Until a fix has propagated, optimization of AVIF files is disabled.