diff --git a/pkgs/development/compilers/swift/default.nix b/pkgs/development/compilers/swift/default.nix
index 26e9f2b87e1..0885a2a4008 100644
--- a/pkgs/development/compilers/swift/default.nix
+++ b/pkgs/development/compilers/swift/default.nix
@@ -332,5 +332,8 @@ stdenv.mkDerivation {
     platforms = platforms.linux;
     badPlatforms = platforms.i686;
     broken = stdenv.isAarch64; # 2018-09-04, never built on Hydra
+    knownVulnerabilities = [
+      "CVE-2020-9861"
+    ];
   };
 }