CVE-2026-25646LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files.
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LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.55, an out-of-bounds read vulnerability exists in the png_set_quantize() API function. When the function is called with no histogram and the number of colors in the palette is more than twice the maximum supported by the user's display, certain palettes will cause the function to enter into an infinite loop that reads past the end of an internal heap-allocated buffer. The images that trigger this vulnerability are valid per the PNG specification. This vulnerability is fixed in 1.6.55.
- CVSS
- 8.1 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-122, CWE-126, CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Aug 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
libpng libpng libpng:libpng | before 1.6.55 | NVD |
References
- https://github.com/pnggroup/libpng/commit/01d03b8453eb30ade759cd45c707e5a1c7277d88patch
- https://github.com/pnggroup/libpng/security/advisories/GHSA-g8hp-mq4h-rqm3exploit, vendor-advisory
- http://www.openwall.com/lists/oss-security/2026/02/09/7mailing-list
- https://access.redhat.com/errata/RHSA-2026:10097
- https://access.redhat.com/errata/RHSA-2026:12274
- https://access.redhat.com/errata/RHSA-2026:14773
- https://access.redhat.com/errata/RHSA-2026:15087
- https://access.redhat.com/errata/RHSA-2026:16174
- https://access.redhat.com/errata/RHSA-2026:17596
- https://access.redhat.com/errata/RHSA-2026:3031
- https://access.redhat.com/errata/RHSA-2026:3405
- https://access.redhat.com/errata/RHSA-2026:3551
- https://access.redhat.com/errata/RHSA-2026:3573
- https://access.redhat.com/errata/RHSA-2026:3574
- https://access.redhat.com/errata/RHSA-2026:3575
- https://access.redhat.com/errata/RHSA-2026:3576
- https://access.redhat.com/errata/RHSA-2026:3577
- https://access.redhat.com/errata/RHSA-2026:3968
- https://access.redhat.com/errata/RHSA-2026:3969
- https://access.redhat.com/errata/RHSA-2026:4221
- https://access.redhat.com/errata/RHSA-2026:4222
- https://access.redhat.com/errata/RHSA-2026:4306
- https://access.redhat.com/errata/RHSA-2026:4501
- https://access.redhat.com/errata/RHSA-2026:4728
- https://access.redhat.com/errata/RHSA-2026:4729
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.