diff --git a/pkgs/applications/networking/znc/default.nix b/pkgs/applications/networking/znc/default.nix
index 667533871993..35ac2e921c43 100644
--- a/pkgs/applications/networking/znc/default.nix
+++ b/pkgs/applications/networking/znc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, openssl, pkg-config
+{ lib, stdenv, fetchurl, fetchpatch2, openssl, pkg-config
 , withPerl ? false, perl
 , withPython ? false, python3
 , withTcl ? false, tcl
@@ -18,6 +18,14 @@ stdenv.mkDerivation rec {
     sha256 = "03fyi0j44zcanj1rsdx93hkdskwfvhbywjiwd17f9q1a7yp8l8zz";
   };
 
+  patches = [
+    (fetchpatch2 {
+      name = "CVE-2024-39844.patch";
+      url = "https://people.znc.in/~darthgandalf/dir/ymQgfvwiG54pPFqyv1U0pcvvj5PLz5.txt";
+      hash = "sha256-+WPlErDI4AR3UZL3P8IitFop1MBEa97pro57pr0/TZw=";
+    })
+  ];
+
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ openssl ]