Node.js is vulnerable to a per-host mTLS authorization bypass via a CA-only SNI context failing open to the default CA

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-123867
StatePUBLISHED
Assigneropenjs
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-11 19:17:33 UTC
Updated2026-11-11 19:17:33 UTC
DescriptionA per-host mutual-TLS authorization bypass in Node.js lets a client authorized for the default hostname reach a protected hostname it is not authorized for. When a TLS server assigns a hostname a different client-certificate CA with server.addContext(host, { ca: protectedCA }) but no server certificate in that SNI context, the per-host client CA is never installed and the handshake falls back to the default client CA. In src/crypto/crypto_tls.cc, CertCbDone installs the SNI context's CA only when setSniContext succeeds, but setSniContext returns false for a context with no server certificate, so a CA-only SNI context silently keeps the default CA. A client holding a certificate trusted by the default CA, but not the protected CA, can therefore complete mTLS to the protected hostname and read its response even with requestCert and rejectUnauthorized enabled, while a client certified by the protected CA is rejected. This vulnerability affects Node.js 26.x, 24.x, and 22.x.

Risk And Classification

Primary CVSS: v3.0 4.2 MEDIUM from ce714d77-add3-4f53-aff5-83d477b104bb

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

Problem Types: CWE-295 | CWE-295 Improper Certificate Validation

VersionSourceTypeScoreSeverityVector
3.0ce714d77-add3-4f53-aff5-83d477b104bbSecondary4.2MEDIUMCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
3.0CNACVSS4.2MEDIUMCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS v3.0 Breakdown

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

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

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: aur0r4_glyph (en)

CNA: mcollina (en)

CNA: UlisesGascon (en)

CNA: pimterry (en)

CNA: aduh95 (en)

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report