CVE-2026-21714
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- CVE-2026-21714
CVE Details
| Release Date: | 2026-03-30 | |
| Impact: | Moderate | What is this? |
Description
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.
See more information about CVE-2026-21714 from MITRE CVE dictionary and NIST NVD
NOTE: The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 metrics
| Base Score: | 5.3 |
| Vector String: | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| Version: | 3.1 |
| Attack Vector: | Network |
| Attack Complexity: | Low |
| Privileges Required: | None |
| User Interaction: | None |
| Scope: | Unchanged |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Low |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 9 (nodejs) | ELSA-2026-7350 | 2026-04-10 |
| Oracle Linux version 9 (nodejs-nodemon) | ELSA-2026-7350 | 2026-04-10 |
| Oracle Linux version 9 (nodejs-packaging) | ELSA-2026-7350 | 2026-04-10 |
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