CVE-2026-92598
Nodemailer before 9.1.0 IDN/Punycode Domain Allow-list Bypass
Description
Nodemailer before 9.1.0 fails to apply UTS-46 normalization when encoding international domain names, causing the domain resolver to compute a different Punycode A-label than standards-compliant parsers. Attackers can craft recipient addresses with invisible characters or compatibility mappings that pass domain allow-list checks but are delivered to attacker-controlled domains via SMTP.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:HAttack ComplexityHigh
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:HConfidentialityHigh
I:LIntegrityLow
A:NAvailabilityNone
Weaknesses
Affected Products
nodemailer
oss-project
Exploitability
No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
References
https://github.com/nodemailer/nodemailer/commit/259c32d
github.com
https://github.com/nodemailer/nodemailer/commit/b212ac4
github.com
https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wmmp-3585-3rmp
github.com
and 1 more references View all →
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