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Vulnerability record · CVE-2025-66293 · published 3 December 2025

CVE-2025-66293: Libpng out-of-bounds read vulnerability

LLibpng · Libpng

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.

7.1 CVSS 3.1 High EPSS 0.35% · top 73.4% CWE-125 · Out-of-bounds read
7.1CVSS 3.1 base score
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 3 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/pnggroup/libpng/commit/788a624d7387a758ffd5c7ab010f1870dea753a1 Patch
https://github.com/pnggroup/libpng/commit/a05a48b756de63e3234ea6b3b938b8f5f862484a Patch
https://github.com/pnggroup/libpng/issues/764 ExploitIssue TrackingPatch
https://github.com/pnggroup/libpng/security/advisories/GHSA-9mpm-9pxh-mg4f ExploitVendor Advisory
http://www.openwall.com/lists/oss-security/2025/12/03/6 Mailing List
http://www.openwall.com/lists/oss-security/2025/12/03/7 Mailing List
http://www.openwall.com/lists/oss-security/2025/12/03/8 Mailing List
https://github.com/pnggroup/libpng/issues/764 ExploitIssue TrackingPatch

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-66293), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.