diff --git a/crates/quinn-proto/RUSTSEC-0000-0000.md b/crates/quinn-proto/RUSTSEC-0000-0000.md
new file mode 100644
index 00000000..3f770320
--- /dev/null
+++ b/crates/quinn-proto/RUSTSEC-0000-0000.md
@@ -0,0 +1,23 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "quinn-proto"
+date = "2026-06-22"
+url = "https://github.com/quinn-rs/quinn/pull/2694"
+categories = ["denial-of-service"]
+cvss = "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
+keywords = ["oom"]
+aliases = ["GHSA-4w2j-m93h-cj5j"]
+
+[versions]
+patched = [">= 0.11.15"]
+```
+
+#  Remote memory exhaustion in quinn-proto from unbounded out-of-order stream reassembly
+
+The `Assembler` component that assembles unordered stream fragments into consecutive chunks of the
+stream incurs some overhead for non-contiguous fragments. Readers that read from a RecvStream in
+order (through an `AsyncRead` impl for example) will be sensitive to peers that send fragments
+while leaving out early parts of the stream, and in particular, fragments with many gaps (because
+these cannot be defragmented). In such a scenario, the receiving connection suffers from high
+buffer overhead, enabling memory exhaustion.