PT-2026-42108 · Six Apart · Movable Type+2

Published 2026-05-20 · Updated 2026-05-20 · CVE-2026-44392

NVD

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Missing authorization vulnerability exists in Movable Type. Under certain conditions, when a user without administrator privileges signs in to the product, unintended update processing may be executed.

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-44392

Affected Products

Movable Type

Movable Type Advanced

Movable Type Premium

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-44392 · Security Note
• https://movabletype.org/news/2026/05/mt-908-released.html · Note
• https://sixapart.jp/movabletype/news/2026/05/20-1100.html · Note
• https://jvn.jp/en/jp/JVN66473735 · Note