If a malformed data is input to the affected product, a CSV file downloaded from the affected product may contain such malformed data. When a victim user download and open such a CSV file, the embedded code may be executed in the user's environment. Note that Movable Type 7 series and 8.4 series, which are End-of-Life (EOL), are affected by the vulnerability as well.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact Low

No CVSS v3.1

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction Required

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00012.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Six Apart Subscribe
Movable Type Subscribe
Six Apart Ltd Subscribe
Movable Type Subscribe

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Six Apart Subscribe
Movable Type Subscribe
Six Apart Ltd Subscribe
Movable Type Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://jvn.jp/en/jp/JVN45405689/ cve-icon cve-icon
https://movabletype.org/news/2026/02/mt-906-released.html cve-icon cve-icon
https://www.sixapart.jp/movabletype/news/2026/02/04-1100.html cve-icon cve-icon
History

Wed, 04 Feb 2026 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Six Apart
Six Apart movable Type
Six Apart Ltd
Six Apart Ltd movable Type
Vendors & Products Six Apart
Six Apart movable Type
Six Apart Ltd
Six Apart Ltd movable Type

Wed, 04 Feb 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 04 Feb 2026 07:15:00 +0000

Type Values Removed Values Added
Description If a malformed data is input to the affected product, a CSV file downloaded from the affected product may contain such malformed data. When a victim user download and open such a CSV file, the embedded code may be executed in the user's environment. Note that Movable Type 7 series and 8.4 series, which are End-of-Life (EOL), are affected by the vulnerability as well.
Weaknesses CWE-1236
References
Metrics cvssV3_0

{'score': 6.5, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L'}

cvssV4_0

{'score': 4.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: jpcert

Published:

Updated: 2026-02-04T15:55:26.690Z

Reserved: 2026-01-29T02:02:27.800Z

Link: CVE-2026-24447

cve-icon Vulnrichment

Updated: 2026-02-04T15:55:22.739Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-04T07:16:01.560

Modified: 2026-02-04T16:33:44.537

Link: CVE-2026-24447

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-04T21:18:27Z

Weaknesses