Description

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.

INFO

Published Date :

2026-02-12T18:22:58.098Z

Last Modified :

2026-02-17T15:36:08.731Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-21435 vulnerability.

Vendors Products
Quic-go
  • Webtransport-go
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-21435.

URL Resource
https://github.com/quic-go/webtransport-go/releases/tag/v0.10.0 cve-icon cve-icon
https://github.com/quic-go/webtransport-go/security/advisories/GHSA-px4r-g4p3-hhqv cve-icon cve-icon
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