| Package | Affected versions | Patched versions |
|---|---|---|
| golang.org/x/net | < 0.60.0 | 0.60.0 |
| stdlib | ≥ 1.27.0-0, < 1.27.2< 1.26.9 | 1.27.21.26.9 |
The HTTP/2 server can refund connection-level flow control twice for the same data: Once when a client resets a stream (refunding data for any sent-but-unread portion of the stream), and again when a request handler reads the buffered data. A malicious client can exploit this to bypass the configured connection-level flow control limit (MaxReceiveBufferPerConnection). Total buffered data is still limited by the concurrent stream limit and stream-level flow control.
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