diff --git a/pkgs/by-name/ne/networkmanager-sstp/package.nix b/pkgs/by-name/ne/networkmanager-sstp/package.nix
index 42df1b088fa8..e394ba6ba658 100644
--- a/pkgs/by-name/ne/networkmanager-sstp/package.nix
+++ b/pkgs/by-name/ne/networkmanager-sstp/package.nix
@@ -78,6 +78,9 @@ stdenv.mkDerivation rec {
   meta = {
     description = "NetworkManager's sstp plugin";
     inherit (networkmanager.meta) maintainers teams platforms;
+    knownVulnerabilities = [
+      "CVE-2026-91838"
+    ];
     license = lib.licenses.gpl2Plus;
   };
 }