CVEvulnerability
CVE-2026-92598
8.3 HIGH
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-09-16
- Last modified
- 2026-09-22
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 8.3 HIGH — CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
- Weaknesses
- CWE-436
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.
Related
Weakness · CWE (1)
- CWE-436 Interpretation Conflict weakness
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
- https://www.vulncheck.com/advisories/nodemailer-before-9.1.0-idn-punycode-domain-allow-list-bypass www.vulncheck.com
- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wmmp-3585-3rmp github.com