cvedb.io
CVE-2026-21435
MEDIUM · CVSS 5.3
EPSS exploitation probability: 0%
Published 2026-02-12T19:15:51.503 · Last modified 2026-06-17T10:18:40.043

Summary

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.

Affected products

quic-go — webtransport-go

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.