diff --git a/src/core/cff_parser.js b/src/core/cff_parser.js
index 540972e9e4f6e..d4b67901b79c6 100644
--- a/src/core/cff_parser.js
+++ b/src/core/cff_parser.js
@@ -1407,6 +1407,12 @@ class CFFCompiler {
       }
     }
 
+    const xuid = cff.topDict.getByName("XUID");
+    if (xuid && xuid.length > 16) {
+      // Length of XUID array must not be greater than 16 (issue #12399).
+      cff.topDict.removeByName("XUID");
+    }
+
     cff.topDict.setByName("charset", 0);
     var compiled = this.compileTopDicts(
       [cff.topDict],
diff --git a/test/pdfs/.gitignore b/test/pdfs/.gitignore
index 33b9df646d6c5..cadb2e9f3c3fe 100644
--- a/test/pdfs/.gitignore
+++ b/test/pdfs/.gitignore
@@ -169,6 +169,7 @@
 !issue5202.pdf
 !images_1bit_grayscale.pdf
 !issue5280.pdf
+!issue12399_reduced.pdf
 !issue5677.pdf
 !issue5954.pdf
 !issue6612.pdf
diff --git a/test/pdfs/issue12399_reduced.pdf b/test/pdfs/issue12399_reduced.pdf
new file mode 100644
index 0000000000000..10241c031e4f2
Binary files /dev/null and b/test/pdfs/issue12399_reduced.pdf differ
diff --git a/test/test_manifest.json b/test/test_manifest.json
index f2de8f17273b1..9a566ca30347b 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -1914,6 +1914,12 @@
        "type": "eq",
        "about": "Please note that this file currently renders incorrectly."
     },
+    {  "id": "issue12399",
+       "file": "pdfs/issue12399_reduced.pdf",
+       "md5": "01bdd258be93e10f8399708eecedbfd6",
+       "rounds": 1,
+       "type": "eq"
+    },
     {  "id": "issue5808-text",
        "file": "pdfs/issue5808.pdf",
        "md5": "e0584dd540d7859d6c191aa53379692e",