CVE-2026-125756 | BDVDB-2026-402994 Detail
postalsyspostal-mime
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.
Impact#
Per CVSS v3.1: confidentiality impact none, integrity impact high, availability impact none. Attack vector: network.
Weaknesses#
- CWE-436 Interpretation Conflict
References#
- https://github.com/postalsys/postal-mime/security/advisories/GHSA-jh3p-792r-98gm
- https://github.com/postalsys/postal-mime/commit/646725704463839f233472453b7c8306bd1dde21
- https://github.com/postalsys/postal-mime/releases/tag/v4.2.1
- https://github.com/postalsys/postal-mime/blob/939a220bd518f54d98a088c315d7227e6215cae3/src/address-parser.ts#L265
- https://www.vulncheck.com/advisories/postal-mime-before-4.2.1-sender-spoofing-via-address-parser-domain-truncation
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.