diff --git a/lib/shared/cwec.js b/lib/shared/cwec.js
index 81e6e8f..57e02f2 100644
--- a/lib/shared/cwec.js
+++ b/lib/shared/cwec.js
@@ -734,6 +734,7 @@ export default /** @type {const} */ ({
       id: 'CWE-1423',
       name: 'Exposure of Sensitive Information caused by Shared Microarchitectural Predictor State that Influences Transient Execution',
     },
+    { id: 'CWE-1426', name: 'Improper Validation of Generative AI Output' },
     { id: 'CWE-143', name: 'Improper Neutralization of Record Delimiters' },
     { id: 'CWE-144', name: 'Improper Neutralization of Line Delimiters' },
     { id: 'CWE-145', name: 'Improper Neutralization of Section Delimiters' },