CVE-2026-21438 (GCVE-0-2026-21438)

Vulnerability from cvelistv5 – Published: 2026-02-12 18:25 – Updated: 2026-02-17 15:39
VLAI
Title
webtransport-go affected by a Memory Exhaustion Attack due to Missing Cleanup of Streams Map
Summary
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.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-17 15:38 UTC
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
  • CWE-459 - Incomplete Cleanup
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7655 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
quic-go webtransport-go Affected: < 0.10.0
guessed Create a notification for this product.
Show details on NVD website
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