Issues

• Add Zig package support (build.zig + build.zig.zon)

  madler/zlib#1340 · Filter by author by965738071 opened on Oct 19, 2026

• CVE-2026-76844 currently points at zlib in error (the gz_vacate CVE is CVE-2026-85091)

  madler/zlib#1330 · Filter by author UlisesGascon opened on Oct 7, 2026

• Seraphine Finding #2 (Prior report; found before; portfolio usage)

  madler/zlib#1322 · Filter by author jaii2p opened on Sep 27, 2026

• The 1.3.2 won't compile shared library on FreeBSD 15

  madler/zlib#1318 · Filter by author Zoran-Vasiljevic opened on Sep 16, 2026

• Typo: SENTIVE -> SENSITIVE

  madler/zlib#1312 · Filter by author schwehr opened on Sep 10, 2026
  2

• deflate(Z_FINISH) returns Z_OK (not the doc-guaranteed Z_STREAM_END) when raw-deflate output exactly fills a deflateBound()-sized buffer

  madler/zlib#1300 · Filter by author JasonGross opened on Aug 24, 2026

• [SECURITY] Stack buffer over-read in minizip unzGetCurrentFileInfo() — missing null termination

  madler/zlib#1299 · Filter by author thinhlx-vn opened on Aug 22, 2026
  1

• [doc] zlib.h: windowBits Z_DATA_ERROR guarantee doesn't hold for raw or gzip

  madler/zlib#1298 · Filter by author JasonGross opened on Aug 19, 2026
  1

• crc32.c triggers -Wshorten-64-to-32 with Clang

  madler/zlib#1287 · Filter by author bmehta001 opened on Jul 28, 2026

• Unchecked block size in zipRemoveExtraInfoBlock (contrib/minizip/zip.c) causes heap-buffer-overflow write

  madler/zlib#1276 · Filter by author nakata-app opened on Jul 1, 2026
  2

• contrib (minizip): potential buffer overflow in zipRemoveExtraInfoBlock

  madler/zlib#1265 · Filter by author mswilson opened on Jun 8, 2026
  4

• A logical block opening on the line closes on the line with mis-matching arguments

  madler/zlib#1264 · Filter by author ilya-fedin opened on Jun 8, 2026
  2

• cross compile x86_64-linux-musl from x86_64-linux-gnu failed. /usr/lib/libc.so: invalid ELF header

  madler/zlib#1262 · Filter by author trcrsired opened on Jun 4, 2026
  3

• Minizip include path inconsistency

  madler/zlib#1252 · Filter by author dg0yt opened on May 29, 2026
  7

• Version property in minizip.pc

  madler/zlib#1251 · Filter by author dg0yt opened on May 29, 2026
  7

• CMake Config hardcodes shared and static 'components', which will cause find_package(ZLIB) to fail if zlib does not provide one of those

  madler/zlib#1249 · Filter by author invy opened on May 29, 2026
  1

• Optimize put_short() macro in trees.c by caching pending state and emitting two bytes together

  madler/zlib#1241 · Filter by author ParkHanbum opened on May 21, 2026
  3

• CMake: Configured zconf.h may be incorrect depending on SCM software

  madler/zlib#1232 · Filter by author oold opened on May 6, 2026
  9

• versioned symbol coverage

  madler/zlib#1228 · Filter by author gordonmessmer opened on May 3, 2026
  4

• Possible memory leak

  madler/zlib#1223 · Filter by author tgilyova opened on Apr 24, 2026
  2

• contrib/minizip: zip64 EoCDL lookup differs from other ZIP implementations

  madler/zlib#1221 · Filter by author snajafov opened on Apr 21, 2026
  2

• minizip.pc references wrong include directory

  madler/zlib#1211 · Filter by author xiota opened on Mar 25, 2026
  6

• CMake is unable to find the static library for zlib v1.3.2 during the libpng configuration

  madler/zlib#1207 · Filter by author sincos2854 opened on Mar 17, 2026
  2

• 32-bit mingw-w64 builds are broken in 1.3.2

  madler/zlib#1202 · Filter by author lhmouse opened on Mar 5, 2026
  2

• CMake build flags aren't propagated to tests and causes failure on macOS when building v1.3.2 for the other arch

  madler/zlib#1199 · Filter by author Mr-Clam opened on Mar 4, 2026