CVE-2026-21714 (GCVE-0-2026-21714)

Vulnerability from cvelistv5 – Published: 2026-03-30 19:07 – Updated: 2026-03-31 18:05
VLAI?
Summary
A memory leak occurs in Node.js HTTP/2 servers when a client sends WINDOW_UPDATE frames on stream 0 (connection-level) that cause the flow control window to exceed the maximum value of 2³¹-1. The server correctly sends a GOAWAY frame, but the Http2Session object is never cleaned up. This vulnerability affects HTTP2 users on Node.js 20, 22, 24 and 25.
Severity ?
5.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
Impacted products
Vendor Product Version
nodejs node Affected: 20.20.1 , ≤ 20.20.1 (semver)
Affected: 22.22.1 , ≤ 22.22.1 (semver)
Affected: 24.14.0 , ≤ 24.14.0 (semver)
Affected: 25.8.1 , ≤ 25.8.1 (semver)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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