CVE-2026-21438
MEDIUMwebtransport-go < 0.10.0 - Denial of Service via Unbounded Memory Consumption
Title source: llmDescription
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.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_confirm
https://github.com/quic-go/webtransport-go/security/advisories/GHSA-2f2x-8mwp-p2gc
Release Notes x_refsource_misc
https://github.com/quic-go/webtransport-go/releases/tag/v0.10.0
Scores
CVSS v3
5.3
EPSS
0.0037
EPSS Percentile
28.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-459
CWE-401
Status
published
Products (2)
quic-go/webtransport-go
< 0.10.0
quic-go/webtransport-go
0 - 0.10.0Go
Published
Feb 12, 2026
Tracked Since
Feb 18, 2026