Version 1.6.59 [September 28, 2026]
  Fixed CVE-2026-46675 (medium severity):
    Use-after-free of zlib input in `png_read_end` after incomplete zTXt, iTXt
    or iCCP decompression.
    (Reported independently by Ze Sheng and
    <JasonHonKL@users.noreply.github.com>.)
  Fixed a regression introduced in version 1.6.47 that caused libpng to reject
    hIST chunks in their correct position, after PLTE.
    (Contributed by Yuki Sekiguchi.)
  Prevented a double free of `png_struct` members after an allocation failure.
    (Contributed by Anthony Hurtado.)
  Applied fixes and updates to the CMake build.
  Adopted the REUSE Specification for licensing the CI files.