Secuno
ENNL
Book demo

CVE-2026-86934

Claris Filemaker Server broken access control

9.1 CRITICALEPSS 0.32%
  1. Published23 Sept 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Claris Filemaker Server< 26.0.3

Remediation

Fixed in
Claris Filemaker Server≥ 26.0.3

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-773669.9
obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian…
CVE-2026-1093438.1
SurrealDB before 3.3.0 allows cross-tenant access because the SurrealQL USE statement…
CVE-2026-1093348.1
SurrealDB before 3.3.0 does not check the caller-selected namespace or database against…
CVE-2026-1054118.1
An Authorization Bypass Through User-Controlled Key vulnerability affecting Tuleap…
CVE-2026-1088538.1
UnicomAI Wanwu before 0.6.3 contains an insecure direct object reference vulnerability…
CVE-2026-1087588.2
Easy!Appointments through 1.6.0 contains an authorization bypass vulnerability in…

Frequently asked

Is CVE-2026-86934 being actively exploited?

CVE-2026-86934 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.32%.

How severe is CVE-2026-86934?

CVE-2026-86934 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.32% probability of exploitation.

Which products are affected by CVE-2026-86934?

Affected products include Claris Filemaker Server.

How do I fix CVE-2026-86934?

Upgrade affected software to a fixed version, for example Claris Filemaker Server 26.0.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-86934 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.