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Vulnerability Details :

CVE-2026-24447

Summary
Assigner-jpcert
Assigner Org ID-ede6fdc4-6654-4307-a26d-3331c018e2ce
Published At-04 Feb, 2026 | 07:04
Updated At-04 Feb, 2026 | 15:55
Rejected At-
Credits

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:jpcert
Assigner Org ID:ede6fdc4-6654-4307-a26d-3331c018e2ce
Published At:04 Feb, 2026 | 07:04
Updated At:04 Feb, 2026 | 15:55
Rejected At:
▼CVE Numbering Authority (CNA)

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.

Affected Products
Vendor
Six Apart Ltd.
Product
Movable Type (Software Edition)
Versions
Affected
  • 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)
Vendor
Six Apart Ltd.
Product
Movable Type Advanced (Software Edition)
Versions
Affected
  • 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)
Vendor
Six Apart Ltd.
Product
Movable Type Premium (Software Edition)
Versions
Affected
  • 9.0.4 (MTP 9.0 series)
  • 2.13 and earlier (MTP 2 series)
Vendor
Six Apart Ltd.
Product
Movable Type Premium (Advanced Edition) (Software Edition)
Versions
Affected
  • 9.0.4 (MTP 9.0 series)
  • 2.13 and earlier (MTP 2 series)
Vendor
Six Apart Ltd.
Product
Movable Type (Cloud Edition)
Versions
Affected
  • 9.0.5 (9 series)
  • 8.8.1 (8 series)
Vendor
Six Apart Ltd.
Product
Movable Type Premium (Cloud Edition)
Versions
Affected
  • 9.0.5 (9 series)
  • 2.12 (MTP 2 series)
Problem Types
TypeCWE IDDescription
CWECWE-1236Improper neutralization of formula elements in a CSV file
Type: CWE
CWE ID: CWE-1236
Description: Improper neutralization of formula elements in a CSV file
Metrics
VersionBase scoreBase severityVector
3.06.5MEDIUM
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
4.04.8MEDIUM
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
Version: 3.0
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Version: 4.0
Base score: 4.8
Base severity: MEDIUM
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
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://movabletype.org/news/2026/02/mt-906-released.html
N/A
https://www.sixapart.jp/movabletype/news/2026/02/04-1100.html
N/A
https://jvn.jp/en/jp/JVN45405689/
N/A
Hyperlink: https://movabletype.org/news/2026/02/mt-906-released.html
Resource: N/A
Hyperlink: https://www.sixapart.jp/movabletype/news/2026/02/04-1100.html
Resource: N/A
Hyperlink: https://jvn.jp/en/jp/JVN45405689/
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:vultures@jpcert.or.jp
Published At:04 Feb, 2026 | 07:16
Updated At:04 Feb, 2026 | 16:33

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.04.8MEDIUM
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Secondary3.06.5MEDIUM
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Type: Secondary
Version: 4.0
Base score: 4.8
Base severity: MEDIUM
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Secondary
Version: 3.0
Base score: 6.5
Base severity: MEDIUM
Vector:
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-1236Primaryvultures@jpcert.or.jp
CWE ID: CWE-1236
Type: Primary
Source: vultures@jpcert.or.jp
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://jvn.jp/en/jp/JVN45405689/vultures@jpcert.or.jp
N/A
https://movabletype.org/news/2026/02/mt-906-released.htmlvultures@jpcert.or.jp
N/A
https://www.sixapart.jp/movabletype/news/2026/02/04-1100.htmlvultures@jpcert.or.jp
N/A
Hyperlink: https://jvn.jp/en/jp/JVN45405689/
Source: vultures@jpcert.or.jp
Resource: N/A
Hyperlink: https://movabletype.org/news/2026/02/mt-906-released.html
Source: vultures@jpcert.or.jp
Resource: N/A
Hyperlink: https://www.sixapart.jp/movabletype/news/2026/02/04-1100.html
Source: vultures@jpcert.or.jp
Resource: N/A

Change History

0
Information is not available yet

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CWE ID-CWE-1236
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Details not found