diff --git a/pkgs/development/libraries/opencv/3.x.nix b/pkgs/development/libraries/opencv/3.x.nix
index 874f95357596..97df84637ef7 100644
--- a/pkgs/development/libraries/opencv/3.x.nix
+++ b/pkgs/development/libraries/opencv/3.x.nix
@@ -9,7 +9,7 @@
 , enableTIFF      ? true, libtiff
 , enableWebP      ? true, libwebp
 , enableEXR ?     !stdenv.isDarwin, openexr, ilmbase
-, enableJPEG2K    ? true, jasper
+, enableJPEG2K    ? false, jasper  # disable jasper by default (many CVE)
 , enableEigen     ? true, eigen
 , enableOpenblas  ? true, openblas
 , enableContrib   ? true
diff --git a/pkgs/development/libraries/opencv/4.x.nix b/pkgs/development/libraries/opencv/4.x.nix
index a5eb1029ad91..408368b89c40 100644
--- a/pkgs/development/libraries/opencv/4.x.nix
+++ b/pkgs/development/libraries/opencv/4.x.nix
@@ -9,7 +9,7 @@
 , enableTIFF      ? true, libtiff
 , enableWebP      ? true, libwebp
 , enableEXR ?     !stdenv.isDarwin, openexr, ilmbase
-, enableJPEG2K    ? true, jasper
+, enableJPEG2K    ? false, jasper  # disable jasper by default (many CVE)
 , enableEigen     ? true, eigen
 , enableOpenblas  ? true, openblas
 , enableContrib   ? true
diff --git a/pkgs/development/libraries/opencv/default.nix b/pkgs/development/libraries/opencv/default.nix
index b91a1489eb69..db8a5e5a41bb 100644
--- a/pkgs/development/libraries/opencv/default.nix
+++ b/pkgs/development/libraries/opencv/default.nix
@@ -6,7 +6,7 @@
 , enablePNG ? true, libpng
 , enableTIFF ? true, libtiff
 , enableEXR ? (!stdenv.isDarwin), openexr, ilmbase
-, enableJPEG2K ? true, jasper
+, enableJPEG2K ? false, jasper  # disable jasper by default (many CVE)
 , enableFfmpeg ? false, ffmpeg
 , enableGStreamer ? false, gst_all_1
 , enableEigen ? true, eigen