diff --git a/CHANGELOG b/CHANGELOG
index ab8ca62f8..e39e7ee5b 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,8 +1,26 @@
 This is the changelog file for the POCO C++ Libraries.
 
-Release 1.12.3 (2022-??-??)
+Release 1.12.3 (2022-10-24)
 ===========================
 
+- GH #3682: Including Any.h causes Compiler error on Visual Studio
+- GH #3683: Poco::format receives empty Vector<Any>
+- GH #3692: v1.12.0 and v1.12.1 Poco::Any compile problem
+- GH #3723: DateTimeFormatter creates invalid ISO8601 string
+- GH #3737: Poco EventImpl for Win32 breaks INFINITE wait
+- GH #3744: bindImplLOB zero size (or NULL) HY104 "Invalid precision value"
+- GH #3748: Poco 1.12.2 - Building DataMySQL still fails (issue #3689)
+- GH #3753: Fix optional JSON support for MySQL
+- GH #3763: Poco::Util::Application VxWorks main is incorrect
+- GH #3769: Fixed converting/correcting pre-gregorian dates (#3723).
+- GH #3795: aix system NumberFormatter.cpp build error
+- GH #3805: Upgrade expat to 2.4.9
+- GH #3814: Security Vulnerability identified in POCO version 1.12.2
+- GH #3825: VS 2022 Net project missing ARM64 config
+- GH #3834: SocketImpl::available()
+- GH #3846: Upgrade bundled zlib to 1.2.13 [fixes CVE]
+- GH #3847: Upgrade bundled SQLite to 3.39.4
+
 
 Release 1.12.2 (2022-08-08)
 ===========================
diff --git a/doc/99100-ReleaseNotes.page b/doc/99100-ReleaseNotes.page
index 1b07733c2..3f88b4214 100644
--- a/doc/99100-ReleaseNotes.page
+++ b/doc/99100-ReleaseNotes.page
@@ -6,6 +6,24 @@ AAAIntroduction
 
 !!Summary of Changes
 
+  - GH #3682: Including Any.h causes Compiler error on Visual Studio
+  - GH #3683: Poco::format receives empty Vector<Any>
+  - GH #3692: v1.12.0 and v1.12.1 Poco::Any compile problem
+  - GH #3723: DateTimeFormatter creates invalid ISO8601 string
+  - GH #3737: Poco EventImpl for Win32 breaks INFINITE wait
+  - GH #3744: bindImplLOB zero size (or NULL) HY104 "Invalid precision value"
+  - GH #3748: Poco 1.12.2 - Building DataMySQL still fails (issue #3689)
+  - GH #3753: Fix optional JSON support for MySQL
+  - GH #3763: Poco::Util::Application VxWorks main is incorrect
+  - GH #3769: Fixed converting/correcting pre-gregorian dates (#3723).
+  - GH #3795: aix system NumberFormatter.cpp build error
+  - GH #3805: Upgrade expat to 2.4.9
+  - GH #3814: Security Vulnerability identified in POCO version 1.12.2
+  - GH #3825: VS 2022 Net project missing ARM64 config
+  - GH #3834: SocketImpl::available()
+  - GH #3846: Upgrade bundled zlib to 1.2.13 [fixes CVE]
+  - GH #3847: Upgrade bundled SQLite to 3.39.4
+
 
 !!!Release 1.12.2