CVE-2026-86934

Authorization Bypass via Extended Privilege Header in FileMaker Server Web Publishing Engine

Published Sep 23, 2026 CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:claris:filemaker_server:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Title Authorization Bypass via Extended Privilege Header in FileMaker Server Web Publishing Engine
Type Values Removed Values Added
Title Authorization Bypass via Privileged Header in FileMaker Server Web Publishing Engine
Weaknesses CWE-285
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-639
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

Type Values Removed Values Added
First Time appeared Claris
Claris filemaker Server
Vendors & Products Claris
Claris filemaker Server
Type Values Removed Values Added
Title Authorization Bypass via Privileged Header in FileMaker Server Web Publishing Engine
Weaknesses CWE-285
Type Values Removed Values Added
Description 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.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apple
Published
Updated
Sep 24, 2026, 2:40 PM
Reserved
Sep 8, 2026, 4:43 PM
Status
Analyzed
Published
Sep 23, 2026, 6:17 PM
Modified
Oct 5, 2026, 6:17 PM