CVE-2026-25646
Published: February 10th, 2026
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.
HIGH
CVSS v3: 8.1
CVSS v3: 8.1
Status
| DocFilters Release | Package | State | Justification | Comment |
|---|---|---|---|---|
| 0.0.0.1 | libpng (1.6.40) | Resolved | Code Not Present | Patched applied from https://github.com/pnggroup/libpng/commit/01d03b8453eb30ade759cd45c707e5a1c7277d88 |
| 26.1.1 | libpng (1.6.40) | Resolved | Code Not Present | Patched applied from https://github.com/pnggroup/libpng/commit/01d03b8453eb30ade759cd45c707e5a1c7277d88 |
| 26.1 | libpng (1.6.40) | Resolved | Code Not Present | Patched applied from https://github.com/pnggroup/libpng/commit/01d03b8453eb30ade759cd45c707e5a1c7277d88 |
| 25.4 | libpng (1.6.40) | Needs Triage | ||
| 25.3 | libpng (1.6.40) | Needs Triage | ||
| 25.2 | libpng (1.6.40) | Needs Triage | ||
| 25.1.2 | libpng (1.6.40) | Resolved | Code Not Present | Patched applied from https://github.com/pnggroup/libpng/commit/01d03b8453eb30ade759cd45c707e5a1c7277d88 |
| 25.1.1 | libpng (1.6.40) | Needs Triage | ||
| 25.1 | libpng (1.6.40) | Needs Triage | ||
| 24.4 | libpng (1.6.40) | Needs Triage | ||
| 24.4.0 | libpng (1.6.40) | Needs Triage | ||
| 24.3 | libpng (1.6.40) | Needs Triage | ||
| 24.2.1 | libpng (1.6.40) | Needs Triage | ||
| 24.2 | libpng (1.6.40) | Needs Triage | ||
| 24.1 | libpng (1.6.40) | Needs Triage | ||
| 23.3 | libpng (1.6.40) | Needs Triage | ||
| 23.2.1 | libpng (1.6.37) | Needs Triage | ||
| 23.2 | libpng (1.6.37) | Needs Triage | ||
| 23.1 | libpng (1.6.37) | Needs Triage | ||
| 22.4 | libpng (1.6.37) | Needs Triage | ||
| 22.3 | libpng (1.6.37) | Needs Triage | ||
| 22.2 | libpng (1.6.37) | Needs Triage | ||
| 22.1 | libpng (1.6.37) | Needs Triage | ||
| 21.11.1 | libpng (1.6.37) | Needs Triage | ||
| 21.11 | libpng (1.6.37) | Needs Triage | ||
| 21.8.1 | libpng (1.6.37) | Needs Triage | ||
| 21.8 | libpng (1.6.37) | Needs Triage | ||
| 21.5.1 | libpng (1.6.37) | Needs Triage | ||
| 21.5.0 | libpng (1.6.37) | Needs Triage | ||
| 21.2.0 | libpng (1.6.37) | Needs Triage | ||
| 11.4.20 | libpng (1.6.37) | Needs Triage | ||
| 11.4.19.3667 | libpng (1.6.37) | Needs Triage | ||
| 11.4.18.3599 | libpng (1.6.37) | Needs Triage | ||
| 11.4.17 | libpng (1.6.37) | Needs Triage | ||
| 11.4.16.3445 | libpng (1.6.28) | Needs Triage | ||
| 11.4.15.3368 | libpng (1.6.28) | Needs Triage | ||
| 11.4.14.3263 | libpng (1.6.28) | Needs Triage | ||
| 11.4.13.3179 | libpng (1.6.28) | Needs Triage | ||
| 11.4.12.3054 | libpng (1.6.28) | Needs Triage | ||
| 11.4.11.3040 | libpng (1.6.28) | Needs Triage | ||
| 11.4.11.2990 | libpng (1.6.28) | Needs Triage | ||
| 11.4.10.2934 | libpng (1.6.28) | Needs Triage | ||
| 11.4.9.2878 | libpng (1.6.28) | Needs Triage | ||
| 11.4.8.2822 | libpng (1.6.28) | Needs Triage |
Severity score breakdown
Attack Complexity
HIGH
Attack Vector
NETWORK
Availability Impact
HIGH
Base Score
8.1
Base Severity
HIGH
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Privileges Required
NONE
Scope
UNCHANGED
User Interaction
NONE
Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Version
3.1