Critical severity · published Jul 1, 2026
CVE-2026-58025
Remote Code Execution via Unsafe Deserialization in LogItem Import
9.8
CVSS
0.5%
EPSS
No
On KEV
Description
Deserialization of untrusted data vulnerability in Wikimedia Foundation MediaWiki.
This vulnerability is associated with program files includes/Import/WikiImporter.Php, includes/Import/WikiRevision.Php, includes/Logging/LogEntryBase.Php.
This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
MediaWiki · Wikimedia Foundation
before 1.46.0, 1.45.4, 1.44.6, 1.43.9 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-58025
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-58025
Permissions Required
https://phabricator.wikimedia.org/T422244
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