Vulnerability · Published Sep 23, 2026 · Assigned by apple
CVE-2026-86934
Critical 9.1
In plain English
A critical-severity authorization bypass via user-controlled key in FileMaker Server from Claris. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).
Severity (CVSS 3.1)9.1Critical
Exploit odds (30 days)0.3%top 75.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Claris | FileMaker Server | 0 – before 26.0.3 |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N