High severity · published Sep 30, 2026
CVE-2026-103441
Unauthenticated arbitrary file deletion through Wikibase serialized entity parsing
7.2
CVSS
0.3%
EPSS
No
On KEV
Description
Deserialization of untrusted data vulnerability in The Wikimedia Foundation MediaWiki Wikibase extension allows Leverage Executable Code in Non-Executable Files.
This issue affects MediaWiki Wikibase extension: 1.46, 1.45, and 1.43.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MW
MediaWiki Wikibase extension · The Wikimedia Foundation
1.46; 1.45; 1.43 · source: vendor
Affected product
MW
MediaWiki Wikibase extension
The Wikimedia Foundation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103441
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103441
phabricator.wikimedia.org
https://phabricator.wikimedia.org/T435210
gerrit.wikimedia.org
https://gerrit.wikimedia.org/r/q/Id35bf747e48370e474d9b9444bd7520b24836e8d
More from MediaWiki Wikibase extension
5.4
CVE-2026-22710
Stored XSS through autocomment system messages in Wikibase