diff --git a/crates/openssl/RUSTSEC-0000-0000.md b/crates/openssl/RUSTSEC-0000-0000.md
new file mode 100644
index 0000000..99a29e2
--- /dev/null
+++ b/crates/openssl/RUSTSEC-0000-0000.md
@@ -0,0 +1,18 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "openssl"
+date = "2023-06-20"
+url = "https://github.com/sfackler/rust-openssl/issues/1965"
+categories = ["memory-exposure"]
+
+[affected]
+functions = { "openssl::x509::verify::X509VerifyParamRef::set_host" = ["< 0.10.55, >=0.10.0"] }
+
+[versions]
+patched = [">= 0.10.55"]
+```
+
+# `openssl` `X509VerifyParamRef::set_host` buffer over-read
+
+When this function was passed an empty string, `openssl` would attempt to call `strlen` on it, reading arbitrary memory until it reached a NUL byte.