Bug 2536089 (CVE-2026-92598) - CVE-2026-92598 nodemailer: Nodemailer: Domain allow-list bypass via improper international domain name encoding
Summary: CVE-2026-92598 nodemailer: Nodemailer: Domain allow-list bypass via improper ...
Keywords:
Status: NEW
Alias: CVE-2026-92598
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-17 15:03 UTC by OSIDB Bzimport
Modified: 2026-11-03 08:28 UTC (History)
21 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-17 15:03:54 UTC 
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.
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