diff --git a/synthtool/gcp/templates/java_library/SECURITY.md b/synthtool/gcp/templates/java_library/SECURITY.md
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@@ -0,0 +1,7 @@
+# Security Policy
+
+To report a security issue, please use [g.co/vulnz](https://g.co/vulnz).
+
+The Google Security Team will respond within 5 working days of your report on g.co/vulnz.
+
+We use g.co/vulnz for our intake, and do coordination and disclosure here using GitHub Security Advisory to privately discuss and fix the issue.
diff --git a/synthtool/gcp/templates/node_library/SECURITY.md b/synthtool/gcp/templates/node_library/SECURITY.md
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index 000000000..8b58ae9c0
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+++ b/synthtool/gcp/templates/node_library/SECURITY.md
@@ -0,0 +1,7 @@
+# Security Policy
+
+To report a security issue, please use [g.co/vulnz](https://g.co/vulnz).
+
+The Google Security Team will respond within 5 working days of your report on g.co/vulnz.
+
+We use g.co/vulnz for our intake, and do coordination and disclosure here using GitHub Security Advisory to privately discuss and fix the issue.
diff --git a/synthtool/gcp/templates/python_library/SECURITY.md b/synthtool/gcp/templates/python_library/SECURITY.md
new file mode 100644
index 000000000..8b58ae9c0
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+++ b/synthtool/gcp/templates/python_library/SECURITY.md
@@ -0,0 +1,7 @@
+# Security Policy
+
+To report a security issue, please use [g.co/vulnz](https://g.co/vulnz).
+
+The Google Security Team will respond within 5 working days of your report on g.co/vulnz.
+
+We use g.co/vulnz for our intake, and do coordination and disclosure here using GitHub Security Advisory to privately discuss and fix the issue.