CVSS 4.0
8.3 highCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:NCVE-2026-92598
High (8.3). EPSS 0.4% chance of exploitation in the next 30 days. Fixed in nodemailer 9.1.0.
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.
Severity
CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-31)
- CWE
- CWE-436
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-wmmp-3585-3rmp | npm | nodemailer | <9.1.0 | 9.1.0 |
References
- https://github.com/nodemailer/nodemailer/commit/259c32d
- https://github.com/nodemailer/nodemailer/commit/b212ac4
- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wmmp-3585-3rmp
- https://www.vulncheck.com/advisories/nodemailer-before-9.1.0-idn-punycode-domain-allow-list-bypass
- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wmmp-3585-3rmp