An authorization bypass vulnerability in the FileMaker Server Web Publishing Engine allowed requests containing an extended privilege header to bypass the disabled Custom Web Publishing with XML...

An authorization bypass vulnerability in the FileMaker Server Web Publishing Engine allowed requests containing an extended privilege header to bypass the disabled Custom Web Publishing with XML setting and access the XML Web Publishing interface. This vulnerability is addressed in FileMaker Server version 26.0.3.

CVSS 3.1

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

Severity from

no source yet

Weakness

CWE-639

• www.cve.org/CVERecord?id=CVE-2026-86934
• nvd.nist.gov/vuln/detail/CVE-2026-86934
• support.claris.com/s/answerview?anum=000049217&language=en_US