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CVE-2026-21438

MEDIUM CVSS: 5.3 Published: 2026-02-12 Modified: 2026-06-17

Description

webtransport-go is an implementation of the WebTransport protocol. Prior to 0.10.0, an attacker can cause unbounded memory consumption repeatedly creating and closing many WebTransport streams. Closed streams were not removed from an internal session map, preventing garbage collection of their resources. This vulnerability is fixed in v0.10.0.

Affected Platforms

Quic-Go Webtransport-Go

Weakness Type

CWE-401, CWE-459

References