{"id":"CVE-2026-125756","published":"2026-11-10T16:17:22.937","lastModified":"2026-11-10T19:21:13.490","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.","cvssScore":5.9,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","cwes":["CWE-436"],"vendors":[],"products":[],"references":[{"url":"https://github.com/postalsys/postal-mime/blob/939a220bd518f54d98a088c315d7227e6215cae3/src/address-parser.ts#L265","tags":[]},{"url":"https://github.com/postalsys/postal-mime/commit/646725704463839f233472453b7c8306bd1dde21","tags":[]},{"url":"https://github.com/postalsys/postal-mime/releases/tag/v4.2.1","tags":[]},{"url":"https://github.com/postalsys/postal-mime/security/advisories/GHSA-jh3p-792r-98gm","tags":[]},{"url":"https://www.vulncheck.com/advisories/postal-mime-before-4.2.1-sender-spoofing-via-address-parser-domain-truncation","tags":[]}],"exploitRefs":[{"url":"https://github.com/postalsys/postal-mime/blob/939a220bd518f54d98a088c315d7227e6215cae3/src/address-parser.ts#L265","tags":[]},{"url":"https://github.com/postalsys/postal-mime/commit/646725704463839f233472453b7c8306bd1dde21","tags":[]},{"url":"https://github.com/postalsys/postal-mime/releases/tag/v4.2.1","tags":[]},{"url":"https://github.com/postalsys/postal-mime/security/advisories/GHSA-jh3p-792r-98gm","tags":[]}],"hasPoc":true,"ai":null}