CVE-2025-66293 HIGH

CVE-2025-66293: LIBPNG has an out-of-bounds read in png_image_read_composite

Vendor Pnggroup
Product libpng
Weakness CWE-125
Published December 3, 2025
Last update December 4, 2025
View on NVD All CVEs

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

What the vulnerability does

01Description

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.52, an out-of-bounds read vulnerability in libpng's simplified API allows reading up to 1012 bytes beyond the png_sRGB_base[512] array when processing valid palette PNG images with partial transparency and gamma correction. The PNG files that trigger this vulnerability are valid per the PNG specification; the bug is in libpng's internal state management. Upgrade to libpng 1.6.52 or later.

Key dates

02Disclosure timeline

December 3, 2025 CVE published
December 4, 2025 Record updated