CVE Explorer
CVE-2026-21714
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.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"node","vendor":"nodejs","versions":[{"lessThanOrEqual":"20.20.1","status":"affected","version":"20.20.1","versionType":"semver"},{"lessThanOrEqual":"22.22.1","status":"affected","version":"22.22.1","versionType":"semver"},{"lessThanOrEqual":"24.14.0","status":"affected","version":"24.14.0","versionType":"semver"},{"lessThanOrEqual":"25.8.1","status":"affected","version":"25.8.1","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:8c792a701168ce4e718d5200694ae9e20da24c0a4c6e7f2cb3e99c084c5fe79f · sha256:b9a8a7af75134f56… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.0"},"metric_type":"cvssV3_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:8c792a701168ce4e718d5200694ae9e20da24c0a4c6e7f2cb3e99c084c5fe79f · sha256:b9a8a7af75134f56… · /containers/cna/metrics/0/cvssV3_0
CWE assertions
1 source assertion{"cweId":"CWE-401","description":"CWE-401 Missing Release of Memory after Effective Lifetime","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:8c792a701168ce4e718d5200694ae9e20da24c0a4c6e7f2cb3e99c084c5fe79f · sha256:b9a8a7af75134f56… · /containers/adp/0/problemTypes/0/descriptions/0
Source references
1 source assertion{"url":"https://nodejs.org/en/blog/vulnerability/march-2026-security-releases"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:8c792a701168ce4e718d5200694ae9e20da24c0a4c6e7f2cb3e99c084c5fe79f · sha256:b9a8a7af75134f56… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.