CVE-2026-106072

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-106072
StatePUBLISHED
Assignerhackerone
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-23 17:17:20 UTC
Updated2026-11-02 16:17:25 UTC
DescriptionA flaw in Node.js TLS hostname verification allows a certificate with only a DNS SAN to authenticate an IP endpoint when the client connects using a non-canonical IPv4 spelling, such as `0177.0.0.1`, `0x7f.0.0.1`, `2130706433` or `127.1`. `tls.checkServerIdentity()` did not classify these hosts as IP addresses, but normalized them to their canonical form and matched the result against the certificate DNS names. A certificate containing `DNS:127.0.0.1` and no `IP Address:127.0.0.1` SAN was therefore accepted, while the same certificate is correctly rejected for `127.0.0.1`. Exploitation requires a certificate with a numeric DNS SAN issued by a CA trusted by the client, and a platform resolver that accepts these spellings, such as glibc. This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.

Risk And Classification

Primary CVSS: v3.0 6.7 MEDIUM from [email protected]

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

EPSS: 0.006170000 probability, percentile 0.495550000 (date 2026-11-02)

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

VersionSourceTypeScoreSeverityVector
3.0[email protected]Secondary6.7MEDIUMCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L
3.0CNADECLARED6.7MEDIUMCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L

CVSS v3.0 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Nodejs Node affected 22.23.3 22.23.3 semver Not specified
CNA Nodejs Node affected 24.22.0 24.22.0 semver Not specified
CNA Nodejs Node affected 26.12.0 26.12.0 semver Not specified

References

ReferenceSourceLinkTags
nodejs.org/en/blog/vulnerability/october-2026-security-releases [email protected] nodejs.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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