PatchTheCVECVE-2026-86930: An out-of-bounds read vulnerability in FileMaker Server for Linux allowed an attacker uploading a specially cr
CVE-2026-86930 is a critical-severity flaw (CVSS 9.1) affecting filemaker server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 this priority
- Critical severity
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.1 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 79%) |
| CISA exploited list | No |
| Weakness | CWE-125 |
| Published | 2026-09-23 |
| Last modified | 2026-10-05 |
Last updated 2026-10-05 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-86930?
filemaker server: upgrade to 26.0.3. Exact commands for each OS are on this page.
Is CVE-2026-86930 being exploited?
CVE-2026-86930 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-86930 affect?
CVE-2026-86930 affects filemaker server. Severity is critical (CVSS 9.1). 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 vulnerab
How urgent is CVE-2026-86930?
Priority 47/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist
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