CVE-2026-96408
Received Received - Intake

Code Injection in Movable Type Upgrade Script

Publication date: 2026-10-07

Last updated on: 2026-10-07

Assigner: JPCERT/CC

Description
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.

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Meta Information

Published
2026-10-07
Last Modified
2026-10-07
Generated
2026-10-07
AI Q&A
2026-10-07
EPSS Evaluated
N/A
NVD
CVE-2026-96408
EUVD
EUVD-2026-94281

Affected Vendors & Products

Showing 7 associated CPEs
Vendor Product Version / Range
Six Apart Ltd. Movable Type Cloud Edition 9.2.0
Six Apart Ltd. Movable Type 9.0.0
Six Apart Ltd. Movable Type 8.8.0
Six Apart Ltd. Movable Type 8.0.0
Six Apart Ltd. Movable Type Premium Cloud Edition 9.2.0
Six Apart Ltd. Movable Type Premium 9.0.0
Six Apart Ltd. Movable Type Premium 2.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

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Executive Summary

CVE-2026-96408 is a code injection vulnerability in Movable Type's upgrade script (mt-upgrade.cgi). It allows unauthenticated attackers to execute arbitrary Perl scripts or SQL queries on the affected system. This could lead to remote code execution or unauthorized data access.

Detection Guidance

Check for the presence of vulnerable scripts like mt-upgrade.cgi, mt-search.cgi, and mt-ftsearch.cgi in your Movable Type installation directory. Use commands such as 'find /path/to/movabletype -name mt-upgrade.cgi' to locate these files.

Impact Analysis

An attacker could exploit this to run malicious code on your server, steal sensitive data, modify or delete content, or gain full control of the system. It may also allow access to unpublished or restricted information.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's data protection requirements or HIPAA's safeguards for protected health information. Non-compliance may result in legal penalties or reputational damage.

Mitigation Strategies

Upgrade to Movable Type versions 9.3.0, 9.0.10, 8.8.6, or 8.0.13 immediately. If upgrading is not possible, block or delete the vulnerable scripts (mt-upgrade.cgi, mt-search.cgi, mt-ftsearch.cgi) or restrict access via environment variables like RestrictedPSGIApp.

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