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TI-2026-59421 Aliases CVE-2026-86930GHSA-xgrq-55wj-qj6g

Out-of-bounds read in Claris FileMaker Server

Priority MEDIUM 47CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

An out-of-bounds read vulnerability in FileMaker Server for Linux allowed an attacker uploading a specially crafted image file to a container field to disclose process memory during thumbnail generation in FileMaker WebDirect. This vulnerability is addressed in FileMaker Server version 26.0.3.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0029 21st percentileScored 2026-11-07
Fix Fixed FileMaker Server (Claris): 26.0.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ClarisFileMaker Serverbefore 26.0.326.0.3Patch availableCNA
  • FileMaker Server VendorClaris Affected before 26.0.3 Fixed in 26.0.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:claris:filemaker_server:*:*:*:*:*:*:*:*before 26.0.3VulnerableClaris
  • cpe:2.3:a:claris:filemaker_server:*:*:*:*:*:*:*:* Versions before 26.0.3 Vulnerable ·Claris

Remediation

  • Fix · CNA FileMaker Server (Claris) Fixed in 26.0.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Claris FileMaker Server 26.0.3

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-59422 Authorization bypass in Claris FileMaker ServerPriority MEDIUM 47
    • TI-2026-59420 Heap-based buffer overflow in Claris FileMaker ServerPriority LOW 35
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-86930
  2. 2026-10-03 Alias added: GHSA-xgrq-55wj-qj6g
  3. 2026-10-05 CVSS score added · NVD

References

Advisory 1

  • TI-2025-29047 Code injection in Claris FileMaker Server CVSS 3.1CRITICAL 9.8
  • TI-2026-59422 Authorization bypass in Claris FileMaker Server CVSS 3.1CRITICAL 9.1
  • TI-2024-18405 Improper access control in Claris FileMaker Server CVSS 3.1HIGH 7.5
  • TI-2026-59420 Heap-based buffer overflow in Claris FileMaker Server CVSS 3.1HIGH 7.8
  • TI-2023-23030 A privilege escalation issue existed in FileMaker Server, potentially exposing sensitive… CVSS 3.1MEDIUM 6.5
  • TI-2025-29046 Information disclosure in Claris FileMaker Server CVSS 3.1MEDIUM 5.3
See all 12 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences