Medium 4.8Published Feb 4, 2026

CVE-2026-24447If a malformed data is input to the affected product, a CSV file downloaded from the affected product may contain such malformed data.

Updated under an hour ago (Oct 27, 2026, 11:20 AM ET)

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It affects Six Apart Ltd. Movable Type (Software Edition) and 5 other products. Add what you run to find out whether that includes you.

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Every CVE for Six Apart Ltd. Movable Type (Software Edition)

Exploited in the last 30 days

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.

CVSS: 4.8 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-1236
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: jpcert
NVD analysis: Deferred
Record last updated: Feb 4, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Six Apart Ltd. Movable Type (Software Edition) six_apart:movable_type_software_edition (from the name)	9.0.4 to 9.0.5 (9.0 series); 8.8.0 to 8.8.1 (8.8 series); 8.0.2 to 8.0.8 (8.0 series)	CNA record
Six Apart Ltd. Movable Type Advanced (Software Edition) six_apart:movable_type_advanced_software_edition (from the name)	9.0.4 to 9.0.5 (9.0 series); 8.8.0 to 8.8.1 (8.8 series); 8.0.2 to 8.0.8 (8.0 series)	CNA record
Six Apart Ltd. Movable Type Premium (Software Edition) six_apart:movable_type_premium_software_edition (from the name)	9.0.4 (MTP 9.0 series); 2.13 and earlier (MTP 2 series)	CNA record
Six Apart Ltd. Movable Type Premium (Advanced Edition) (Software Edition) six_apart:movable_type_premium_advanced_edition_software_edition (from the name)	9.0.4 (MTP 9.0 series); 2.13 and earlier (MTP 2 series)	CNA record
Six Apart Ltd. Movable Type (Cloud Edition) six_apart:movable_type_cloud_edition (from the name)	9.0.5 (9 series); 8.8.1 (8 series)	CNA record
Six Apart Ltd. Movable Type Premium (Cloud Edition) six_apart:movable_type_premium_cloud_edition (from the name)	9.0.5 (9 series); 2.12 (MTP 2 series)	CNA record

References

References

https://movabletype.org/news/2026/02/mt-906-released.html
https://www.sixapart.jp/movabletype/news/2026/02/04-1100.html
https://jvn.jp/en/jp/JVN45405689/

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.