Medium severity · published Feb 4, 2026
CVE-2026-24447
If a malformed data is input to the affected product, a CSV file downloaded from the affected product may contain such malformed data
6.5
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MT
Movable Type (Cloud Edition) · Six Apart Ltd.
9.0.5 (9 series); 8.8.1 (8 series) · source: vendor
MT
Movable Type (Software Edition) · Six Apart Ltd.
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) · source: vendor
MT
Movable Type Advanced (Software Edition) · Six Apart Ltd.
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) · source: vendor
MT
Movable Type Premium (Advanced Edition) (Software Edition) · Six Apart Ltd.
9.0.4 (MTP 9.0 series); 2.13 and earlier (MTP 2 series) · source: vendor
MT
Movable Type Premium (Cloud Edition) · Six Apart Ltd.
9.0.5 (9 series); 2.12 (MTP 2 series) · source: vendor
MT
Movable Type Premium (Software Edition) · Six Apart Ltd.
9.0.4 (MTP 9.0 series); 2.13 and earlier (MTP 2 series) · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-24447
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-24447
jvn.jp
https://jvn.jp/en/jp/JVN45405689/
movabletype.org
https://movabletype.org/news/2026/02/mt-906-released.html
www.sixapart.jp
https://www.sixapart.jp/movabletype/news/2026/02/04-1100.html
More from Movable Type (Cloud Edition)
9.4
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…
8.6
CVE-2026-103668
An SQL Injection vulnerability exists in the Site Search function of Movable Type, which may allow an unauthenticated attacker to execute an arbitrary SQL query on the affected…
6.5
CVE-2026-23704
A non-administrative user can upload malicious files
5.4
CVE-2026-22875
Movable Type contains a stored cross-site scripting vulnerability in Export Sites
5.4
CVE-2026-21393
Movable Type contains a stored cross-site scripting vulnerability in Edit Comment