Golang CVE-2026-21438
MEDIUM
GHSA-2f2x-8mwp-p2gc
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Lifecycle Timeline
3DescriptionNVD
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.
AnalysisAI
Webtransport-go versions prior to 0.10.0 fail to properly clean up closed WebTransport streams from internal session maps, allowing remote attackers to exhaust server memory through repeated stream creation and closure. This denial-of-service condition requires no authentication or user interaction and affects all deployments using the vulnerable library. …
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RemediationAI
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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