diff --git a/crates/personnummer/RUSTSEC-0000-0000.md b/crates/personnummer/RUSTSEC-0000-0000.md
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@@ -0,0 +1,24 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "personnummer"
+date = "2020-09-04"
+url = "https://github.com/personnummer/rust/pull/4"
+aliases = ["GHSA-28r9-pq4c-wp3c"]
+informational = "notice"
+
+[versions]
+patched = [">= 3.0.1"]
+```
+# personnummer Input validation error
+
+Swedish personal identity is in the form of YYMMDD-XXXX
+
+An issue arises from the regular expression allowing the first three digits in
+the last four digits of the personnummer to be 000, which is invalid.
+
+To mitigate this without upgrading, a check on the last four digits can be made
+to make sure it's not 000x.
+
+The affected version should not be relied on without the mitigation to check
+that the swedish personal identity number is valid.