diff --git a/crates/rustls-webpki/RUSTSEC-0000-0000.md b/crates/rustls-webpki/RUSTSEC-0000-0000.md
new file mode 100644
index 0000000..b6bff39
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+++ b/crates/rustls-webpki/RUSTSEC-0000-0000.md
@@ -0,0 +1,31 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "rustls-webpki"
+date = "2023-08-22"
+categories = ["denial-of-service"]
+keywords = ["certificate", "path building", "x509"]
+cvss = "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
+related = ["CVE-2018-16875"]
+
+[versions]
+patched = [">= 0.100.2, < 0.101.0", ">= 0.101.4"]
+
+```
+
+# rustls-webpki: CPU denial of service in certificate path building
+
+When this crate is given a pathological certificate chain to validate, it will
+spend CPU time exponential with the number of candidate certificates at each
+step of path building.
+
+Both TLS clients and TLS servers that accept client certificate are affected.
+
+We now give each path building operation a budget of 100 signature verifications.
+
+The original `webpki` crate is also affected.
+
+This was previously reported in the original crate
+<https://github.com/briansmith/webpki/issues/69> and re-reported to us
+recently by Luke Malinowski.
+
diff --git a/crates/webpki/RUSTSEC-0000-0000.md b/crates/webpki/RUSTSEC-0000-0000.md
new file mode 100644
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+++ b/crates/webpki/RUSTSEC-0000-0000.md
@@ -0,0 +1,28 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "webpki"
+date = "2023-08-22"
+categories = ["denial-of-service"]
+keywords = ["certificate", "path building", "x509"]
+cvss = "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
+related = ["CVE-2018-16875"]
+
+[versions]
+patched = []
+```
+
+# webpki: CPU denial of service in certificate path building
+
+When this crate is given a pathological certificate chain to validate, it will
+spend CPU time exponential with the number of candidate certificates at each
+step of path building.
+
+Both TLS clients and TLS servers that accept client certificate are affected.
+
+This was previously reported in
+<https://github.com/briansmith/webpki/issues/69> and re-reported recently
+by Luke Malinowski.
+
+`rustls-webpki` is a fork of this crate which contains a fix for this issue
+and is actively maintained.