diff --git a/emacs-mark-contents-untrusted.patch b/emacs-mark-contents-untrusted.patch
new file mode 100644
index 0000000..31e8437
--- /dev/null
+++ b/emacs-mark-contents-untrusted.patch
@@ -0,0 +1,25 @@
+From 937b9042ad7426acdcca33e3d931d8f495bdd804 Mon Sep 17 00:00:00 2001
+From: Ihor Radchenko <yantar92@posteo.net>
+Date: Tue, 20 Feb 2024 12:44:30 +0300
+Subject: * lisp/gnus/mm-view.el (mm-display-inline-fontify): Mark contents
+ untrusted.
+
+---
+ lisp/gnus/mm-view.el | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/lisp/gnus/mm-view.el b/lisp/gnus/mm-view.el
+index 2e1261c..5f234e5 100644
+--- a/lisp/gnus/mm-view.el
++++ b/lisp/gnus/mm-view.el
+@@ -504,6 +504,7 @@ If MODE is not set, try to find mode automatically."
+ 	  (setq coding-system (mm-find-buffer-file-coding-system)))
+ 	(setq text (buffer-string))))
+     (with-temp-buffer
++      (setq untrusted-content t)
+       (buffer-disable-undo)
+       (mm-enable-multibyte)
+       (insert (cond ((eq charset 'gnus-decoded)
+-- 
+cgit v1.1
+
diff --git a/emacs.spec b/emacs.spec
index 6a9a22a..7d845e4 100644
--- a/emacs.spec
+++ b/emacs.spec
@@ -34,6 +34,7 @@ Patch7:        emacs-htmlfontify-command-injection-vulnerability.patch
 Patch8:        emacs-ruby-mode-local-command-injection-vulnerability.patch
 Patch9:        emacs-ob-latex-command-injection-vulnerability.patch
 Patch10:       emacs-consider-org-file-contents-unsafe.patch
+Patch11:       emacs-mark-contents-untrusted.patch
 BuildRequires: gcc
 BuildRequires: atk-devel
 BuildRequires: cairo-devel
@@ -202,6 +203,7 @@ Development header files for Emacs.
 %patch8 -p1 -b .ruby-mode-local-command-injection-vulnerability
 %patch9 -p1 -b .ob-latex-command-injection-vulnerability
 %patch10 -p1 -b .consider-org-file-contents-unsafe
+%patch11 -p1 -b .mark-contents-untrusted
 autoconf
 
 # We prefer our emacs.desktop file
@@ -495,6 +497,7 @@ rm %{buildroot}%{_datadir}/icons/hicolor/scalable/mimetypes/emacs-document23.svg
 * Fri Mar 15 2024 Jacek Migacz <jmigacz@redhat.com> - 1:27.2-10
 - Disable xwidgets (RHEL-14551)
 - org-file-contents: Consider all remote files unsafe (CVE-2024-30205)
+- Make Gnus treats inline MIME contents as untrusted (CVE-2024-30203)
 
 * Sun Apr 2 2023 Jacek Migacz <jmigacz@redhat.com> - 1:27.2-9
 - Fix etags local command injection vulnerability (#2175190)