diff --git a/pkgs/development/libraries/gtk/2.x.nix b/pkgs/development/libraries/gtk/2.x.nix
index 9d9b855c9da8..ed0900ee1a92 100644
--- a/pkgs/development/libraries/gtk/2.x.nix
+++ b/pkgs/development/libraries/gtk/2.x.nix
@@ -2,6 +2,7 @@
 , lib
 , stdenv
 , fetchurl
+, fetchpatch
 , atk
 , buildPackages
 , cairo
@@ -63,6 +64,12 @@ stdenv.mkDerivation (finalAttrs: {
   patches = [
     ./patches/2.0-immodules.cache.patch
     ./patches/gtk2-theme-paths.patch
+    (fetchpatch {
+      # https://gitlab.gnome.org/GNOME/gtk/-/issues/6786
+      name = "CVE-2024-6655.patch";
+      url = "https://gitlab.gnome.org/GNOME/gtk/-/commit/3bbf0b6176d42836d23c36a6ac410e807ec0a7a7.patch";
+      hash = "sha256-mstOPk9NNpUwScrdEbvGhmAv8jlds3SBdj53T0q33vM=";
+    })
   ] ++ lib.optionals stdenv.isDarwin [
     ./patches/2.0-gnome_bugzilla_557780_306776_freeciv_darwin.patch
     ./patches/2.0-darwin-x11.patch