CVE-2025-66293

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.

• CWE-125

• https://github.com/pnggroup/libpng/commit/788a624d7387a758ffd5c7ab010f1870dea753a1Patch
• https://github.com/pnggroup/libpng/commit/a05a48b756de63e3234ea6b3b938b8f5f862484aPatch
• https://github.com/pnggroup/libpng/issues/764Exploit, Issue Tracking, Patch
• https://github.com/pnggroup/libpng/security/advisories/GHSA-9mpm-9pxh-mg4fExploit, Vendor Advisory
• http://www.openwall.com/lists/oss-security/2025/12/03/6Mailing List
• http://www.openwall.com/lists/oss-security/2025/12/03/7Mailing List
• http://www.openwall.com/lists/oss-security/2025/12/03/8Mailing List
• https://github.com/pnggroup/libpng/issues/764Exploit, Issue Tracking, Patch

Published

Dec 3, 2025

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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