What is CVE-2026-96408?

CVE-2026-96408 is a critical-severity vulnerability in Six Apart Ltd. Movable Type, classified under Code Injection. CVSS score: 9.4/10. Published 2026-10-07.

How severe is CVE-2026-96408?

Critical severity. CVSS v3 base score is 9.4 out of 10.

RCE in Six Apart Ltd. Movable Type

CVE-2026-96408

A code injection vulnerability exists in the upgrade script of Movable Type, which may allow an unauthenticated attacker to execute an arbitrary Perl script or an SQL query on the affected product.

Vulnerability class: RCE (Remote Code Execution)

Published 2026-10-07 · last modified 2026-10-07.

CVSS v3 metric

CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-94 — Code Injection

References

Frequently asked questions

What is CVE-2026-96408?: CVE-2026-96408 is a critical-severity vulnerability in Six Apart Ltd. Movable Type, classified under Code Injection. CVSS score: 9.4/10. Published 2026-10-07.
How severe is CVE-2026-96408?: Critical severity. CVSS v3 base score is 9.4 out of 10.