CVE-2026-125756

MediumCVSS 5.9/10Last modified Nov 12, 2026

Description

postal-mime before 4.2.1 contains a parser differential vulnerability in its address parser that truncates the domain at folding whitespace or comments preceding a dot. Remote attackers can craft From headers that pass SPF/DKIM/DMARC alignment for their own subdomain while PostalMime.parse() reports a spoofed victim sender address.

Metrics

CVSS 3.1 5.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-436

Affected software

No affected versions have been published.

Timeline

Published: Nov 10, 2026
Last modified: Nov 12, 2026
NVD status: Deferred

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