diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index c7b2023..ed245ce 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -16,6 +16,19 @@ repos:
       - id: check-yaml
       - id: no-commit-to-branch
       - id: mixed-line-ending
+  - repo: local
+    hooks:
+      - id: sensitive-data-leak-urls
+        name: Sensitive data leak - URLs
+        entry: sbb\.ch\b
+        language: pygrep
+        types: [text]
+        exclude: \b(www\.|polarion-opensource@)sbb\.ch\b
+      - id: sensitive-data-leak-ue-numbers
+        name: Sensitive data leak - UE numbers
+        entry: ([uUeE]{1,2})\d{5,6}
+        language: pygrep
+        types: [text]
   - repo: https://github.com/zricethezav/gitleaks
     rev: v8.20.1
     hooks: