Node.js is vulnerable to an HTTP/2 memory and file-descriptor leak via a protocol error during session shutdown

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-123865
StatePUBLISHED
Assigneropenjs
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-11 19:17:33 UTC
Updated2026-11-11 19:17:33 UTC
DescriptionAn unauthenticated HTTP/2 client can permanently leak Node.js server memory and file descriptors. If a peer triggers a protocol error, for example an oversized frame header, while the session is already shutting down, nghttp2 tears the session down internally but Node.js never notices, leaving a dangling session: the socket stays in CLOSE_WAIT and all of Node.js's HTTP/2 state for that connection is held in memory indefinitely, with no further cost to the attacker. The attacker can start the shutdown remotely by sending GOAWAY(NO_ERROR), so it is reliable against default HTTP/2 servers. It is an incomplete-fix case of CVE-2026-48937: that fix detected nghttp2 internal terminations by watching for GOAWAY sent while not shutting down, but missed terminations that arrive while the session is already shutting down. This vulnerability affects Node.js 26.x, 24.x, and 22.x.

Risk And Classification

Primary CVSS: v3.0 7.5 HIGH from ce714d77-add3-4f53-aff5-83d477b104bb

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-400 | CWE-400 Uncontrolled Resource Consumption

VersionSourceTypeScoreSeverityVector
3.0ce714d77-add3-4f53-aff5-83d477b104bbSecondary7.5HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.0CNACVSS7.5HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Nodejs Node affected 0.0.0 22.23.5 semver Not specified
CNA Nodejs Node affected 23.0.0 24.22.3 semver Not specified
CNA Nodejs Node affected 25.0.0 26.13.1 semver Not specified

References

ReferenceSourceLinkTags
cna.openjsf.org/security-advisories.html ce714d77-add3-4f53-aff5-83d477b104bb cna.openjsf.org
nodejs.org/en/blog/vulnerability/november-2026-security-releases ce714d77-add3-4f53-aff5-83d477b104bb nodejs.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: pimterry (en)

CNA: mcollina (en)

CNA: aduh95 (en)

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