diff --git a/exe/bundler-ui b/exe/bundler-ui
index 6e071b0..530bb75 100755
--- a/exe/bundler-ui
+++ b/exe/bundler-ui
@@ -1,6 +1,10 @@
 #!/usr/bin/env ruby
 # frozen_string_literal: true
 
+$LOAD_PATH.unshift "/Users/zirni/dev/bundle_update_interactive/lib"
+puts $LOAD_PATH
+
 require "bundle_update_interactive"
 
+
 BundleUpdateInteractive::CLI.new.run
diff --git a/lib/bundle_update_interactive/cli.rb b/lib/bundle_update_interactive/cli.rb
index 302bf10..9eb4ce8 100644
--- a/lib/bundle_update_interactive/cli.rb
+++ b/lib/bundle_update_interactive/cli.rb
@@ -9,17 +9,19 @@ def run(argv: ARGV) # rubocop:disable Metrics/AbcSize
       report, updater = generate_report(options)
 
       puts_legend_and_withheld_gems(report) unless report.empty?
-      puts("No gems to update.").then { return } if report.updatable_gems.empty?
+      updatable_gems = select_updatable_gems(report, options)
+      puts(no_gems_message(options)).then { return } if updatable_gems.empty?
 
-      selected_gems = MultiSelect.prompt_for_gems_to_update(report.updatable_gems)
+      selected_gems = select_gems_to_update(updatable_gems, options)
       puts("No gems to update.").then { return } if selected_gems.empty?
 
-      puts "Updating the following gems."
+      puts "baem the Updating the following gems."
       puts Table.updatable(selected_gems).render
       puts
 
       if options.commit?
-        GitCommitter.new(updater).apply_updates_as_individual_commits(*selected_gems.keys)
+        committer = GitCommitter.new(updater, advisories: advisories_for_commit(selected_gems, options))
+        committer.apply_updates_as_individual_commits(*selected_gems.keys)
       else
         updater.apply_updates(*selected_gems.keys)
       end
@@ -31,6 +33,30 @@ def run(argv: ARGV) # rubocop:disable Metrics/AbcSize
 
     private
 
+    def select_updatable_gems(report, options)
+      return report.updatable_gems unless options.only_security_updates?
+
+      report.security_updates(include_major_updates: options.with_major_update?)
+    end
+
+    def select_gems_to_update(updatable_gems, options)
+      return updatable_gems if options.auto_update?
+
+      MultiSelect.prompt_for_gems_to_update(updatable_gems)
+    end
+
+    def no_gems_message(options)
+      return "No gems to update." unless options.only_security_updates?
+
+      "No security updates to apply."
+    end
+
+    def advisories_for_commit(selected_gems, options)
+      return {} unless options.commit_bundle_audit_message?
+
+      selected_gems.transform_values(&:advisories)
+    end
+
     def puts_gemfile_modified_notice
       puts BundleUpdateInteractive.pastel.yellow("Your Gemfile was changed to accommodate the latest gem versions.")
     end
diff --git a/lib/bundle_update_interactive/cli/options.rb b/lib/bundle_update_interactive/cli/options.rb
index 9cc06ca..5684cd9 100644
--- a/lib/bundle_update_interactive/cli/options.rb
+++ b/lib/bundle_update_interactive/cli/options.rb
@@ -52,6 +52,12 @@ def help # rubocop:disable Metrics/AbcSize
               Allow the latest gem versions, ignoring Gemfile pins. May modify the Gemfile.
               #{pastel.green('bundle update-interactive')} #{pastel.yellow('--latest')}
 
+              Update only gems with known security vulnerabilities, excluding major updates.
+              #{pastel.green('bundle update-interactive')} #{pastel.yellow('--only-security-updates')}
+
+              Update gems with known security vulnerabilities, allowing major updates.
+              #{pastel.green('bundle update-interactive')} #{pastel.yellow('--only-security-updates --with-major-update')}
+
           HELP
         end
 
@@ -74,6 +80,22 @@ def build_parser(options) # rubocop:disable Metrics/AbcSize, Metrics/MethodLengt
             parser.on("--only-explicit", "Update Gemfile gems only (no indirect dependencies)") do
               options.only_explicit = true
             end
+            parser.on("--auto-update", "Update every gem in the list without prompting for selection") do
+              options.auto_update = true
+            end
+            parser.on("--only-security-updates", "Update only gems with known security vulnerabilities") do
+              options.only_security_updates = true
+            end
+            parser.on("--with-major-update", "Include major version bumps among --only-security-updates") do
+              options.with_major_update = true
+            end
+            parser.on(
+              "--commit-bundle-audit-message",
+              "Append bundler-audit advisory details to each commit body (implies --commit)"
+            ) do
+              options.commit = true
+              options.commit_bundle_audit_message = true
+            end
             parser.on(
               "--exclusively=GROUP",
               "Update gems exclusively belonging to the specified Gemfile GROUP(s)"
@@ -97,19 +119,32 @@ def build_parser(options) # rubocop:disable Metrics/AbcSize, Metrics/MethodLengt
       end
 
       attr_accessor :exclusively
-      attr_writer :commit, :latest, :only_explicit
+      attr_writer :commit, :latest, :only_explicit, :only_security_updates, :with_major_update,
+                  :commit_bundle_audit_message, :auto_update
 
       def initialize
         @exclusively = []
         @commit = false
         @latest = false
         @only_explicit = false
+        @only_security_updates = false
+        @with_major_update = false
+        @commit_bundle_audit_message = false
+        @auto_update = false
       end
 
       def commit?
         @commit
       end
 
+      def auto_update?
+        @auto_update
+      end
+
+      def commit_bundle_audit_message?
+        @commit_bundle_audit_message
+      end
+
       def latest?
         @latest
       end
@@ -117,6 +152,14 @@ def latest?
       def only_explicit?
         @only_explicit
       end
+
+      def only_security_updates?
+        @only_security_updates
+      end
+
+      def with_major_update?
+        @with_major_update
+      end
     end
   end
 end
diff --git a/lib/bundle_update_interactive/git_committer.rb b/lib/bundle_update_interactive/git_committer.rb
index 9b7a942..ed0477e 100644
--- a/lib/bundle_update_interactive/git_committer.rb
+++ b/lib/bundle_update_interactive/git_committer.rb
@@ -1,11 +1,14 @@
 # frozen_string_literal: true
 
-require "shellwords"
-
 module BundleUpdateInteractive
   class GitCommitter
-    def initialize(updater)
+    # Most to least severe. Advisories without a CVSS score report a nil criticality
+    # and are sorted last.
+    CRITICALITY_ORDER = %i[critical high medium low none].freeze
+
+    def initialize(updater, advisories: {})
       @updater = updater
+      @advisories = advisories
     end
 
     def apply_updates_as_individual_commits(*gem_names)
@@ -17,9 +20,8 @@ def apply_updates_as_individual_commits(*gem_names)
         updated_gem = updates[name] || updates.values.first
         next if updated_gem.nil?
 
-        commit_message = format_commit_message(updated_gem)
         system "git add Gemfile Gemfile.lock", exception: true
-        system "git commit -m #{commit_message.shellescape}", exception: true
+        system(*["git", "commit", *commit_message_args(name, updated_gem)], exception: true)
       end
     end
 
@@ -35,9 +37,41 @@ def format_commit_message(outdated_gem)
       ].compact.join(" ")
     end
 
+    def format_commit_body(name)
+      advisories = advisories_for(name)
+      return nil if advisories.empty?
+
+      lines = ["Fixes known security vulnerabilities:", ""]
+      sort_by_criticality(advisories).each do |advisory|
+        criticality = advisory[:criticality]
+        lines << "* #{"[#{criticality}] " if criticality}#{advisory[:title]}".rstrip
+        lines << "  #{advisory[:url]}" if advisory[:url]
+      end
+      lines.join("\n")
+    end
+
     private
 
-    attr_reader :updater
+    attr_reader :updater, :advisories
+
+    def commit_message_args(name, updated_gem)
+      subject = format_commit_message(updated_gem)
+      body = format_commit_body(name)
+      return ["-m", subject] if body.nil?
+
+      ["-m", subject, "-m", body]
+    end
+
+    def advisories_for(name)
+      Array(advisories[name])
+    end
+
+    # Stable sort: most severe first, preserving original order within the same criticality.
+    def sort_by_criticality(advisories)
+      advisories.each_with_index.sort_by do |advisory, index|
+        [CRITICALITY_ORDER.index(advisory[:criticality]) || CRITICALITY_ORDER.length, index]
+      end.map(&:first)
+    end
 
     def assert_git_executable!
       success = begin
diff --git a/lib/bundle_update_interactive/outdated_gem.rb b/lib/bundle_update_interactive/outdated_gem.rb
index ce04408..fccf62f 100644
--- a/lib/bundle_update_interactive/outdated_gem.rb
+++ b/lib/bundle_update_interactive/outdated_gem.rb
@@ -11,10 +11,12 @@ class OutdatedGem
                   :updated_version,
                   :updated_git_version
 
+    attr_accessor :advisories
     attr_writer :changelog_uri, :rubygems_source, :vulnerable
 
     def initialize(**attrs)
       @vulnerable = nil
+      @advisories = []
       @changelog_locator = ChangelogLocator.new
 
       attrs.each { |name, value| public_send(:"#{name}=", value) }
diff --git a/lib/bundle_update_interactive/report.rb b/lib/bundle_update_interactive/report.rb
index f63739f..7b085e4 100644
--- a/lib/bundle_update_interactive/report.rb
+++ b/lib/bundle_update_interactive/report.rb
@@ -3,7 +3,6 @@
 require "bundler"
 require "bundler/audit"
 require "bundler/audit/scanner"
-require "set"
 
 module BundleUpdateInteractive
   class Report
@@ -23,16 +22,25 @@ def all_gems
       @all_gems ||= withheld_gems.merge(updatable_gems)
     end
 
+    # Gems with a known security vulnerability that can be updated. Major version bumps are
+    # excluded unless include_major_updates is true. scan_for_vulnerabilities! must be run first.
+    def security_updates(include_major_updates: false)
+      updatable_gems.select do |_name, gem|
+        gem.vulnerable? && (include_major_updates || !gem.semver_change.major?)
+      end
+    end
+
     def scan_for_vulnerabilities!
       return false if all_gems.empty?
 
       Bundler::Audit::Database.update!(quiet: true)
       audit_report = Bundler::Audit::Scanner.new.report
-      vulnerable_gem_names = Set.new(audit_report.vulnerable_gems.map(&:name))
+      advisories_by_gem = collect_advisories(audit_report)
 
       all_gems.each do |name, gem|
         exact_deps = current_lockfile && current_lockfile[name].exact_dependencies
-        gem.vulnerable = (vulnerable_gem_names & [name, *Array(exact_deps)]).any?
+        gem.advisories = [name, *Array(exact_deps)].flat_map { |n| advisories_by_gem[n] }
+        gem.vulnerable = gem.advisories.any?
       end
       true
     end
@@ -40,5 +48,15 @@ def scan_for_vulnerabilities!
     private
 
     attr_reader :current_lockfile
+
+    def collect_advisories(audit_report)
+      audit_report.unpatched_gems.each_with_object(Hash.new { |hash, key| hash[key] = [] }) do |result, advisories|
+        advisory = result.advisory
+        url = advisory.url
+        url = "https://github.com/advisories/GHSA-#{advisory.ghsa}" if !url.to_s.include?("github.com") && advisory.ghsa
+
+        advisories[result.gem.name] << { title: advisory.title, url: url, criticality: advisory.criticality }
+      end
+    end
   end
 end