VULNERABILITY INTELLIGENCE

CVE-2026-21438

CVSS score5.3 MEDIUM
EPSS probability0.41%
CISA KEVNot currently listed
Published2026-02-12
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Weakness classification

  • security-advisories@github.com: CWE-401

Primary references