High 7.1Published Dec 3, 2025

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

Updated under an hour ago (Oct 26, 2026, 3:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for pnggroup libpng

Exploited in the last 30 days

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: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Weakness (CWE): CWE-125
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Dec 3, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

pnggroup libpng pnggroup:libpng (from the name)	before 1.6.52	CNA record
libpng libpng libpng:libpng	before 1.6.52	NVD

References

References

https://github.com/pnggroup/libpng/security/advisories/GHSA-9mpm-9pxh-mg4f	x-refsource-confirm, exploit, vendor-advisory
https://github.com/pnggroup/libpng/issues/764	x-refsource-misc, exploit, issue-tracking, patch
https://github.com/pnggroup/libpng/commit/788a624d7387a758ffd5c7ab010f1870dea753a1	x-refsource-misc, patch
https://github.com/pnggroup/libpng/commit/a05a48b756de63e3234ea6b3b938b8f5f862484a	x-refsource-misc, patch
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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.