Node.js is vulnerable to a zlib denial of service via a stream destroy during a pending params() call

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-123862
StatePUBLISHED
Assigneropenjs
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-11 19:17:32 UTC
Updated2026-11-11 19:17:32 UTC
DescriptionAn uncatchable exception in the Node.js zlib streaming API lets a peer crash a process by disconnecting while data is being compressed. zlib.params() queues a flush and completes its work in that write's callback; if the stream is destroyed first, as pipeline() does when the peer goes away, Writable still invokes the callback with an error, but the callback ignores its arguments and asserts that the native handle still exists. The handle is gone, so an ERR_INTERNAL_ASSERTION is thrown from inside stream internals and bypasses the stream's error event, the params() callback, and the pipeline() callback, terminating the process. An application is affected only if it calls deflate.params() while streaming to a peer, which is uncommon. This vulnerability affects Node.js 26.x, 24.x, and 22.x.

Risk And Classification

Primary CVSS: v3.0 2.9 LOW from ce714d77-add3-4f53-aff5-83d477b104bb

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

Problem Types: CWE-248 | CWE-248 Uncaught Exception

VersionSourceTypeScoreSeverityVector
3.0ce714d77-add3-4f53-aff5-83d477b104bbSecondary2.9LOWCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
3.0CNACVSS2.9LOWCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v3.0 Breakdown

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

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

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: Chris Rohlf in collaboration with Claude and Anthropic Research (en)

CNA: mcollina (en)

CNA: UlisesGascon (en)

CNA: aduh95 (en)

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