diff --git a/ANNOUNCE b/ANNOUNCE
index 8d7116ea2..0c6f83939 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,13 +1,5 @@
-libpng 1.6.59.git
-=================
-
-This is a development version, not intended to be a public release.
-It will be replaced by a public release, or by another development
-version, at a later time.
-
-
-libpng 1.6.58 - April 15, 2026
-==============================
+libpng 1.6.59 - September 28, 2026
+==================================
 
 This is a public release of libpng, intended for use in production code.
 
@@ -17,10 +9,10 @@ Files available for download
 
 Source files:
 
- * libpng-1.6.58.tar.xz (LZMA-compressed, recommended)
- * libpng-1.6.58.tar.gz (deflate-compressed)
- * lpng1658.7z (LZMA-compressed)
- * lpng1658.zip (deflate-compressed)
+ * libpng-1.6.59.tar.xz (LZMA-compressed, recommended)
+ * libpng-1.6.59.tar.gz (deflate-compressed)
+ * lpng1659.7z (LZMA-compressed)
+ * lpng1659.zip (deflate-compressed)
 
 Other information:
 
@@ -30,13 +22,21 @@ Other information:
  * TRADEMARK.md
 
 
-Changes from version 1.6.57 to version 1.6.58
+Changes from version 1.6.58 to version 1.6.59
 ---------------------------------------------
 
- * Fixed a regression introduced in version 1.6.56 that caused `png_get_PLTE`
-   to return stale palette data after applying gamma and background transforms
-   in-place.
-   (Reported by ralfjunker <ralfjunker@users.noreply.github.com>.)
+ * 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.
 
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net.
diff --git a/CHANGES b/CHANGES
index b4afd0533..cd637fb98 100644
--- a/CHANGES
+++ b/CHANGES
@@ -6385,7 +6385,19 @@ Version 1.6.58 [April 15, 2026]
     in-place.
     (Reported by ralfjunker <ralfjunker@users.noreply.github.com>.)
 
-Version 1.6.59 [TODO]
+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.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net.
 Subscription is required; visit
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 020489e86..6a1a9405d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -19,8 +19,8 @@ cmake_minimum_required(VERSION 3.14...4.4)
 set(PNGLIB_MAJOR 1)
 set(PNGLIB_MINOR 6)
 set(PNGLIB_REVISION 59)
-#set(PNGLIB_SUBREVISION 0)
-set(PNGLIB_SUBREVISION "git")
+set(PNGLIB_SUBREVISION 0)
+#set(PNGLIB_SUBREVISION "git")
 set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_REVISION})
 set(PNGLIB_ABI_VERSION ${PNGLIB_MAJOR}${PNGLIB_MINOR})
 set(PNGLIB_SHARED_VERSION ${PNGLIB_ABI_VERSION}.${PNGLIB_REVISION}.${PNGLIB_SUBREVISION})
diff --git a/README b/README
index 130c7e766..9fd4e425c 100644
--- a/README
+++ b/README
@@ -1,5 +1,5 @@
-README for libpng version 1.6.59.git
-====================================
+README for libpng version 1.6.59
+================================
 
 See the note about version numbers near the top of `png.h`.
 See `INSTALL` for instructions on how to install libpng.
diff --git a/configure b/configure
index 30a8b5ba9..99a39246f 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.73 for libpng 1.6.59.git.
+# Generated by GNU Autoconf 2.73 for libpng 1.6.59.
 #
 # Report bugs to <png-mng-implement@lists.sourceforge.net>.
 #
@@ -598,8 +598,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='libpng'
 PACKAGE_TARNAME='libpng'
-PACKAGE_VERSION='1.6.59.git'
-PACKAGE_STRING='libpng 1.6.59.git'
+PACKAGE_VERSION='1.6.59'
+PACKAGE_STRING='libpng 1.6.59'
 PACKAGE_BUGREPORT='png-mng-implement@lists.sourceforge.net'
 PACKAGE_URL=''
 
@@ -1410,7 +1410,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-'configure' configures libpng 1.6.59.git to adapt to many kinds of systems.
+'configure' configures libpng 1.6.59 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1481,7 +1481,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of libpng 1.6.59.git:";;
+     short | recursive ) echo "Configuration of libpng 1.6.59:";;
    esac
   cat <<\_ACEOF
 
@@ -1688,7 +1688,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng configure 1.6.59.git
+libpng configure 1.6.59
 generated by GNU Autoconf 2.73
 
 Copyright (C) 2026 Free Software Foundation, Inc.
@@ -1951,7 +1951,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by libpng $as_me 1.6.59.git, which was
+It was created by libpng $as_me 1.6.59, which was
 generated by GNU Autoconf 2.73.  Invocation command line was
 
   $ $0$ac_configure_args_raw
@@ -3571,7 +3571,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='libpng'
- VERSION='1.6.59.git'
+ VERSION='1.6.59'
 
 
 printf '%s\n' "#define PACKAGE \"$PACKAGE\"" >>confdefs.h
@@ -3798,7 +3798,7 @@ fi
 
 
 
-PNGLIB_VERSION=1.6.59.git
+PNGLIB_VERSION=1.6.59
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=6
 PNGLIB_RELEASE=59
@@ -16698,7 +16698,7 @@ cat >>"$CONFIG_STATUS" <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by libpng $as_me 1.6.59.git, which was
+This file was extended by libpng $as_me 1.6.59, which was
 generated by GNU Autoconf 2.73.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -16766,7 +16766,7 @@ ac_cs_config_escaped=`printf '%s\n' "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\
 cat >>"$CONFIG_STATUS" <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
-libpng config.status 1.6.59.git
+libpng config.status 1.6.59
 configured by $0, generated by GNU Autoconf 2.73,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
index 42d0beb66..019a43ff8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,7 +25,7 @@ AC_PREREQ([2.68])
 
 dnl Version number stuff here:
 
-AC_INIT([libpng],[1.6.59.git],[png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng],[1.6.59],[png-mng-implement@lists.sourceforge.net])
 AC_CONFIG_MACRO_DIR([scripts/autoconf])
 
 # libpng does not follow GNU file name conventions (hence 'foreign')
@@ -46,7 +46,7 @@ dnl automake, so the following is not necessary (and is not defined anyway):
 dnl AM_PREREQ([1.11.2])
 dnl stop configure from automagically running automake
 
-PNGLIB_VERSION=1.6.59.git
+PNGLIB_VERSION=1.6.59
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=6
 PNGLIB_RELEASE=59
diff --git a/libpng-manual.txt b/libpng-manual.txt
index 4413ce990..bebc7e06a 100644
--- a/libpng-manual.txt
+++ b/libpng-manual.txt
@@ -9,7 +9,7 @@ libpng-manual.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng version 1.6.36, December 2018, through 1.6.58 - April 2026
+ libpng version 1.6.36, December 2018, through 1.6.59 - September 2026
  Updated and distributed by Cosmin Truta
  Copyright (c) 2018-2026 Cosmin Truta
 
diff --git a/libpng.3 b/libpng.3
index 8100402cc..89ed2f016 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "April 15, 2026"
+.TH LIBPNG 3 "September 28, 2026"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.58
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.59
 
 .SH SYNOPSIS
 \fB#include <png.h>\fP
@@ -528,7 +528,7 @@ libpng-manual.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng version 1.6.36, December 2018, through 1.6.58 - April 2026
+ libpng version 1.6.36, December 2018, through 1.6.59 - September 2026
  Updated and distributed by Cosmin Truta
  Copyright (c) 2018-2026 Cosmin Truta
 
diff --git a/libpngpf.3 b/libpngpf.3
index 4d486d7bd..d80555625 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "April 15, 2026"
+.TH LIBPNGPF 3 "September 28, 2026"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.58
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.59
 
 .SH SYNOPSIS
 \fB#include "pngpriv.h"\fP
diff --git a/png.5 b/png.5
index 803f8f677..f027bb72c 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "April 15, 2026"
+.TH PNG 5 "September 28, 2026"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 
diff --git a/png.c b/png.c
index 6cb809a49..68cfc42e8 100644
--- a/png.c
+++ b/png.c
@@ -13,7 +13,7 @@
 #include "pngpriv.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_59_git Your_png_h_is_not_version_1_6_59_git;
+typedef png_libpng_version_1_6_59 Your_png_h_is_not_version_1_6_59;
 
 /* Sanity check the chunks definitions - PNG_KNOWN_CHUNKS from pngpriv.h and the
  * corresponding macro definitions.  This causes a compile time failure if
@@ -820,7 +820,7 @@ png_get_copyright(png_const_structrp png_ptr)
    return PNG_STRING_COPYRIGHT
 #else
    return PNG_STRING_NEWLINE \
-      "libpng version 1.6.59.git" PNG_STRING_NEWLINE \
+      "libpng version 1.6.59" PNG_STRING_NEWLINE \
       "Copyright (c) 2018-2026 Cosmin Truta" PNG_STRING_NEWLINE \
       "Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson" \
       PNG_STRING_NEWLINE \
diff --git a/png.h b/png.h
index 57f484512..70e6eaebf 100644
--- a/png.h
+++ b/png.h
@@ -1,6 +1,6 @@
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.6.59.git
+ * libpng version 1.6.59
  *
  * Copyright (c) 2018-2026 Cosmin Truta
  * Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson
@@ -14,7 +14,7 @@
  *   libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
  *   libpng versions 0.97, January 1998, through 1.6.35, July 2018:
  *     Glenn Randers-Pehrson
- *   libpng versions 1.6.36, December 2018, through 1.6.58, April 2026:
+ *   libpng versions 1.6.36, December 2018, through 1.6.59, September 2026:
  *     Cosmin Truta
  *   See also "Contributing Authors", below.
  */
@@ -238,7 +238,7 @@
  *    ...
  *    1.5.30                  15    10530  15.so.15.30[.0]
  *    ...
- *    1.6.58                  16    10658  16.so.16.58[.0]
+ *    1.6.59                  16    10659  16.so.16.59[.0]
  *
  *    Henceforth the source version will match the shared-library major and
  *    minor numbers; the shared-library major version number will be used for
@@ -274,7 +274,7 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.6.59.git"
+#define PNG_LIBPNG_VER_STRING "1.6.59"
 #define PNG_HEADER_VERSION_STRING " libpng version " PNG_LIBPNG_VER_STRING "\n"
 
 /* The versions of shared library builds should stay in sync, going forward */
@@ -290,7 +290,7 @@
 /* This should be zero for a public release, or non-zero for a
  * development version.
  */
-#define PNG_LIBPNG_VER_BUILD 1
+#define PNG_LIBPNG_VER_BUILD 0
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA               1
@@ -307,7 +307,7 @@
 #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
                                        PNG_LIBPNG_BUILD_PRIVATE */
 
-#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_BETA
+#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE
 
 /* Careful here.  At one time, Guy wanted to use 082, but that
  * would be octal.  We must not include leading zeros.
@@ -316,7 +316,7 @@
  * From version 1.0.1 it is:
  * XXYYZZ, where XX=major, YY=minor, ZZ=release
  */
-#define PNG_LIBPNG_VER 10659 /* 1.6.59.git */
+#define PNG_LIBPNG_VER 10659 /* 1.6.59 */
 
 /* Library configuration: these options cannot be changed after
  * the library has been built.
@@ -426,7 +426,7 @@ extern "C" {
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef char *png_libpng_version_1_6_59_git;
+typedef char *png_libpng_version_1_6_59;
 
 /* Basic control structions.  Read libpng-manual.txt or libpng.3 for more info.
  *
diff --git a/pngconf.h b/pngconf.h
index 6b607ab1f..3f4aaa509 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,6 +1,6 @@
 /* pngconf.h - machine-configurable file for libpng
  *
- * libpng version 1.6.59.git
+ * libpng version 1.6.59
  *
  * Copyright (c) 2018-2026 Cosmin Truta
  * Copyright (c) 1998-2002,2004,2006-2016,2018 Glenn Randers-Pehrson
diff --git a/scripts/libpng-config-head.in b/scripts/libpng-config-head.in
index 57f7062c7..3221ac42f 100644
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@
 
 # Modeled after libxml-config.
 
-version=1.6.59.git
+version=1.6.59
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index 1e5526b3d..4825a670c 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@ includedir=@includedir@/libpng16
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.6.59.git
+Version: 1.6.59
 Libs: -L${libdir} -lpng16
 Cflags: -I${includedir}
diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt
index f29fdf8c8..d72287a84 100644
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -1,6 +1,6 @@
 /* pnglibconf.h - library build configuration */
 
-/* libpng version 1.6.59.git */
+/* libpng version 1.6.59 */
 
 /* Copyright (c) 2018-2026 Cosmin Truta */
 /* Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson */