diff --git a/pkgs/applications/networking/instant-messengers/armcord/default.nix b/pkgs/applications/networking/instant-messengers/armcord/default.nix
index 1f0d01b6f905..1c7342c143df 100644
--- a/pkgs/applications/networking/instant-messengers/armcord/default.nix
+++ b/pkgs/applications/networking/instant-messengers/armcord/default.nix
@@ -138,5 +138,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ ludovicopiero wrmilling ];
     platforms = [ "x86_64-linux" "aarch64-linux" ];
     mainProgram = "armcord";
+    knownVulnerabilities = [ "CVE-2023-4863" ];
   };
 }
diff --git a/pkgs/applications/networking/mailreaders/mailspring/default.nix b/pkgs/applications/networking/mailreaders/mailspring/default.nix
index 9b5adb3a9772..4f61935faac1 100644
--- a/pkgs/applications/networking/mailreaders/mailspring/default.nix
+++ b/pkgs/applications/networking/mailreaders/mailspring/default.nix
@@ -99,5 +99,6 @@ stdenv.mkDerivation rec {
     homepage = "https://getmailspring.com";
     downloadPage = "https://github.com/Foundry376/Mailspring";
     platforms = [ "x86_64-linux" ];
+    knownVulnerabilities = [ "CVE-2023-4863" ];
   };
 }