diff --git a/.gitignore b/.gitignore
index 6e522bf..c6a1ef0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1 @@
-SOURCES/ruby-4.0.1.tar.xz
+SOURCES/ruby-4.0.3.tar.xz
diff --git a/.ruby.metadata b/.ruby.metadata
index 08dbc27..3dc1e0a 100644
--- a/.ruby.metadata
+++ b/.ruby.metadata
@@ -1 +1 @@
-266e6fa80ed2b4f4bb7de2e98973dc084a1f380e SOURCES/ruby-4.0.1.tar.xz
+faf1f3df171d2160116d190ca32b6b00e0338bfa SOURCES/ruby-4.0.3.tar.xz
diff --git a/SOURCES/ruby-4.0.3-Fix-a-format-string-injection-vulnerability.patch b/SOURCES/ruby-4.0.3-Fix-a-format-string-injection-vulnerability.patch
new file mode 100644
index 0000000..35b0a87
--- /dev/null
+++ b/SOURCES/ruby-4.0.3-Fix-a-format-string-injection-vulnerability.patch
@@ -0,0 +1,86 @@
+From 83dbd3f615bd8e7a31571124059eb3264f73c559 Mon Sep 17 00:00:00 2001
+From: Jean Boussier <jean.boussier@gmail.com>
+Date: Wed, 18 Mar 2026 08:56:17 +0100
+Subject: [PATCH] Fix a format string injection vulnerability
+
+In `JSON.parse(doc, allow_duplicate_key: false)`.
+---
+ ext/json/parser/parser.c      | 26 +++++++++++++++++++-------
+ test/json/json_parser_test.rb |  7 +++++++
+ 2 files changed, 26 insertions(+), 7 deletions(-)
+
+diff --git a/ext/json/parser/parser.c b/ext/json/parser/parser.c
+index 8f9729ef28..a05c5e9657 100644
+--- a/ext/json/parser/parser.c
++++ b/ext/json/parser/parser.c
+@@ -400,14 +400,9 @@ static void emit_parse_warning(const char *message, JSON_ParserState *state)
+ 
+ #define PARSE_ERROR_FRAGMENT_LEN 32
+ 
+-#ifdef RBIMPL_ATTR_NORETURN
+-RBIMPL_ATTR_NORETURN()
+-#endif
+-static void raise_parse_error(const char *format, JSON_ParserState *state)
++static VALUE build_parse_error_message(const char *format, JSON_ParserState *state, long line, long column)
+ {
+     unsigned char buffer[PARSE_ERROR_FRAGMENT_LEN + 3];
+-    long line, column;
+-    cursor_position(state, &line, &column);
+ 
+     const char *ptr = "EOF";
+     if (state->cursor && state->cursor < state->end) {
+@@ -442,11 +437,23 @@ static void raise_parse_error(const char *format, JSON_ParserState *state)
+     VALUE msg = rb_sprintf(format, ptr);
+     VALUE message = rb_enc_sprintf(enc_utf8, "%s at line %ld column %ld", RSTRING_PTR(msg), line, column);
+     RB_GC_GUARD(msg);
++    return message;
++}
+ 
++static VALUE parse_error_new(VALUE message, long line, long column)
++{
+     VALUE exc = rb_exc_new_str(rb_path2class("JSON::ParserError"), message);
+     rb_ivar_set(exc, rb_intern("@line"), LONG2NUM(line));
+     rb_ivar_set(exc, rb_intern("@column"), LONG2NUM(column));
+-    rb_exc_raise(exc);
++    return exc;
++}
++
++NORETURN(static) void raise_parse_error(const char *format, JSON_ParserState *state)
++{
++    long line, column;
++    cursor_position(state, &line, &column);
++    VALUE message = build_parse_error_message(format, state, line, column);
++    rb_exc_raise(parse_error_new(message, line, column));
+ }
+ 
+ #ifdef RBIMPL_ATTR_NORETURN
+@@ -896,6 +903,11 @@ static void raise_duplicate_key_error(JSON_ParserState *state, VALUE duplicate_k
+         rb_inspect(duplicate_key)
+     );
+ 
++    long line, column;
++    cursor_position(state, &line, &column);
++    rb_str_concat(message, build_parse_error_message("", state, line, column)) ;
++    rb_exc_raise(parse_error_new(message, line, column));
++
+     raise_parse_error(RSTRING_PTR(message), state);
+     RB_GC_GUARD(message);
+ }
+diff --git a/test/json/json_parser_test.rb b/test/json/json_parser_test.rb
+index ec9391909d..61ea35d1f9 100644
+--- a/test/json/json_parser_test.rb
++++ b/test/json/json_parser_test.rb
+@@ -411,6 +411,13 @@ def test_parse_duplicate_key
+     end
+   end
+ 
++  def test_parse_duplicate_key_escape
++    error = assert_raise(ParserError) do
++      JSON.parse('{"%s%s%s%s":1,"%s%s%s%s":2}', allow_duplicate_key: false)
++    end
++    assert_match "%s%s%s%s", error.message
++  end
++
+   def test_some_wrong_inputs
+     assert_raise(ParserError) { parse('[] bla') }
+     assert_raise(ParserError) { parse('[] 1') }
diff --git a/SPECS/ruby.spec b/SPECS/ruby.spec
index 38d2c46..ed8718b 100644
--- a/SPECS/ruby.spec
+++ b/SPECS/ruby.spec
@@ -1,6 +1,6 @@
 %global major_version 4
 %global minor_version 0
-%global teeny_version 1
+%global teeny_version 3
 %global major_minor_version %{major_version}.%{minor_version}
 
 %global ruby_version %{major_minor_version}.%{teeny_version}
@@ -36,19 +36,19 @@
 ## BUNDLED_GEMS_VERSIONS
 
 # Bundled libraries versions
-%global rubygems_version 4.0.3
+%global rubygems_version 4.0.6
 %global rubygems_molinillo_version 0.8.0
 %global rubygems_net_http_version 0.7.0
 %global rubygems_net_protocol_version 0.2.2
 %global rubygems_optparse_version 0.8.0
-%global rubygems_resolv_version 0.6.2
+%global rubygems_resolv_version 0.7.0
 %global rubygems_securerandom_version 0.4.1
 %global rubygems_timeout_version 0.4.4
 %global rubygems_tsort_version 0.2.0
 %global rubygems_uri_version 1.1.1
 
 # Default gems.
-%global bundler_version 4.0.3
+%global bundler_version 4.0.6
 %global bundler_connection_pool_version 2.5.4
 %global bundler_fileutils_version 1.8.0
 %global bundler_net_http_persistent_version 4.0.6
@@ -63,7 +63,7 @@
 %global did_you_mean_version 2.0.0
 %global digest_version 3.2.1
 %global english_version 0.8.1
-%global erb_version 6.0.1
+%global erb_version 6.0.1.1
 %global error_highlight_version 0.7.1
 %global etc_version 1.4.6
 %global fcntl_version 1.3.0
@@ -83,7 +83,7 @@
 %global optparse_version 0.8.1
 %global pp_version 0.6.3
 %global prettyprint_version 0.2.0
-%global prism_version 1.8.0
+%global prism_version 1.8.1
 %global psych_version 5.3.1
 %global resolv_version 0.7.0
 %global ruby2_keywords_version 0.0.5
@@ -92,7 +92,7 @@
 %global singleton_version 0.3.0
 %global stringio_version 3.2.0
 %global strscan_version 3.1.6
-%global syntax_suggest_version 2.0.2
+%global syntax_suggest_version 2.0.3
 %global tempfile_version 0.3.1
 %global time_version 0.4.2
 %global timeout_version 0.6.0
@@ -103,7 +103,7 @@
 %global weakref_version 0.1.4
 %global win32_registry_version 0.1.2
 %global yaml_version 0.4.0
-%global zlib_version 3.2.2
+%global zlib_version 3.2.3
 
 # Bundled gems.
 %global abbrev_version 0.1.2
@@ -129,7 +129,7 @@
 %global ostruct_version 0.6.3
 %global power_assert_version 3.0.1
 %global prime_version 0.1.4
-%global pstore_version 0.2.0
+%global pstore_version 0.2.1
 %global racc_version 1.8.1
 %global rake_version 13.3.1
 %global rbs_version 3.10.0
@@ -186,7 +186,7 @@
 Summary: An interpreter of object-oriented scripting language
 Name: ruby
 Version: %{ruby_version}%{?development_release}
-Release: 31%{?dist}
+Release: 32%{?dist}
 # Licenses, which are likely not included in binary RPMs:
 # Apache-2.0:
 #   benchmark/gc/redblack.rb
@@ -293,6 +293,12 @@ Patch8: ruby-4.0.1-Support-customizable-rustc_flags-for-rustc-builds.patch
 # https://github.com/ruby/rdoc/pull/1531
 # Fix error with `gem install --document=rdoc,ri`
 Patch9: rdoc-pr1531-fix-mutilple-document-installation.patch
+# CVE-2026-33210 
+# Fix for Denial of Service or Information Disclosure 
+# via format string injection
+# in Ruby JSON
+# https://github.com/ruby/json/commit/393b41c3e5f87491e1e34fa59fa78ff6fa179a74
+Patch10: ruby-4.0.3-Fix-a-format-string-injection-vulnerability.patch
 
 Requires: %{name}-libs%{?_isa} = %{version}-%{release}
 %{?with_rubypick:Suggests: rubypick}
@@ -809,6 +815,7 @@ popd
 %patch -P 6 -p1
 %patch -P 7 -p1
 %patch -P 8 -p1
+%patch -P 10 -p1
 
 # Provide an example of usage of the tapset:
 cp -a %{SOURCE3} .
@@ -1537,7 +1544,6 @@ make -C %{_vpath_builddir} runruby TESTRUN_SCRIPT=" \
 
 %files doc -f .ruby-doc.en -f .ruby-doc.ja
 %doc README.md
-%doc ChangeLog
 %{?with_systemtap:%doc ruby-exercise.stp}
 %{_datadir}/ri
 
@@ -1969,6 +1975,16 @@ make -C %{_vpath_builddir} runruby TESTRUN_SCRIPT=" \
 
 
 %changelog
+* Wed Apr 29 2026 Tomas Juhasz <tjuhasz@redhat.com> - 4.0.3-32
+- Upgrade to Ruby 4.0.3.
+  Resolves: RHEL-171933
+- Fix ERB: Arbitrary code execution via deserialization bypass
+ (CVE-2026-41316)
+  Resolves: RHEL-171258
+- Fix JSON: Denial of Service or Information Disclosure via format string injection
+ (CVE-2026-33210)
+ Resolves: RHEL-173458
+
 * Thu Jan 15 2026 Jarek Prokop <jprokop@redhat.com> - 4.0.1-31
 - Upgrade to Ruby 4.0.1.
   Resolves: RHEL-142278