diff --git a/crates/convec/RUSTSEC-0000-0000.md b/crates/convec/RUSTSEC-0000-0000.md
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+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "convec"
+date = "2020-11-24"
+url = "https://github.com/krl/convec/issues/2"
+categories = ["memory-corruption", "thread-safety"]
+
+[versions]
+patched = []
+```
+
+# convec::ConVec<T> unconditionally implements Send/Sync
+
+Affected versions of this crate unconditionally implement Send/Sync for `ConVec<T>`.
+This allows users to insert `T` that is not Send or not Sync.
+
+This allows users to create data races by using non-Send types like `Arc<Cell<_>>` or `Rc<_>` as `T` in `ConVec<T>`. It is also possible to create data races by using types like `Cell<_>` or `RefCell<_>` as `T` (types that are `Send` but not `Sync`).
+Such data races can lead to memory corruption.