Categories
CVE-2026-21435

webtransport-go CloseWithError can block indefinitely

Summary

webtransport-go CloseWithError can block indefinitely

Original description

The description as published by the source.

webtransport-go is an implementation of the WebTransport protocol. Prior to v0.10.0, an attacker can cause a denial of service in webtransport-go by preventing or indefinitely delaying WebTransport session closure. A malicious peer can withhold QUIC flow control credit on the CONNECT stream, blocking transmission of the WT_CLOSE_SESSION capsule and causing the close operation to hang. This vulnerability is fixed in v0.10.0.

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

References

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