CVE-2026-21438

MEDIUM SEVERITY

CVSS Score & Metrics

Base Score

5.3 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L                                    

Vulnerability 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.

Vulnerability Details

Published Date

February 12, 2026

Last Modified

February 13, 2026

CWE ID

CWE-401

Source

GitHub

Vendor

Product

github.com/quic-go/webtransport-go

External References

https://github.com/quic-go/webtransport-go/security/advisories/GHSA-2f2x-8mwp-p2gc
https://github.com/quic-go/webtransport-go/releases/tag/v0.10.0
https://github.com/advisories/GHSA-2f2x-8mwp-p2gc

CVE-2026-21438

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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