Bug 2565873 (CVE-2026-121426)

Summary: CVE-2026-121426 nodemailer: Nodemailer: Information disclosure via recipient address parsing flaw
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: abarbaro, alizardo, dschmidt, ikhan, jchui, jhe, jlanda, kaycoth, kshier, ktsao, lchilton, nboldt, oaljalju, psrna, rbobbitt, rhel-process-autobot, sfeifer, simaishi, stcannon, watson-tool-maintainers, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Nodemailer. This vulnerability allows a remote attacker to cause information disclosure by bypassing recipient address restrictions. Due to improper parsing of email addresses containing angle brackets within quoted sections, the parser misidentifies the intended destination domain. Consequently, an attacker can submit a crafted email address that passes domain validation checks while causing outgoing messages to be redirected and delivered to an attacker-controlled server.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-11-03 15:15:56 UTC 
Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that ends an angle-addr at a '>' inside a quoted local part, comment or domain literal. Attackers can submit addresses that validate as an allowed domain but are delivered to an attacker-controlled domain, bypassing recipient allow lists and disclosing message content.