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CVE-2026-21438 Detail

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/quic-go/webtransport-go/releases/tag/v0.10.0 GitHub, Inc.
https://github.com/quic-go/webtransport-go/security/advisories/GHSA-2f2x-8mwp-p2gc GitHub, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-401 Missing Release of Memory after Effective Lifetime GitHub, Inc.  
CWE-459 Incomplete Cleanup GitHub, Inc.  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-21438
NVD Published Date:
02/12/2026
NVD Last Modified:
02/12/2026
Source:
GitHub, Inc.