CVE-2026-21435
Published
CVSS v3
5.3
MEDIUM
CVSS v2
N/A
Affected
1
PROJECT
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.
WebTransport implementation based on quic-go (https://datatracker.ietf.org/doc/draft-ietf-webtrans-http3/)
GitHub