diff --git a/app/assets/javascripts/discourse/app/lib/media-optimization-utils.js b/app/assets/javascripts/discourse/app/lib/media-optimization-utils.js
index 2d18cbf98fe..ad581f01336 100644
--- a/app/assets/javascripts/discourse/app/lib/media-optimization-utils.js
+++ b/app/assets/javascripts/discourse/app/lib/media-optimization-utils.js
@@ -66,6 +66,14 @@ function isTransparent(type, imageData) {
   return false;
 }
 
+function jpegDecodeFailure(type, imageData) {
+  if (!/(\.|\/)jpe?g$/i.test(type)) {
+    return false;
+  }
+
+  return imageData.data[3] === 0;
+}
+
 export async function fileToImageData(file) {
   const drawable = await fileToDrawable(file);
   const imageData = drawableToimageData(drawable);
@@ -74,5 +82,9 @@ export async function fileToImageData(file) {
     throw "Image has transparent pixels, won't convert to JPEG!";
   }
 
+  if (jpegDecodeFailure(file.type, imageData)) {
+    throw "JPEG image has transparent pixel, decode failed!";
+  }
+
   return imageData;
 }