CVE-2026-103441

The MediaWiki Wikibase extension versions 1.46, 1.45, and 1.43 are vulnerable to a deserialization of untrusted data flaw that enables the execution of arbitrary code within non-executable files. This high-severity vulnerability poses a significant risk to systems utilizing these versions, potentially allowing attackers to compromise the integrity and security of the application. Organizations using the affected versions should prioritize immediate updates to mitigate the risk of exploitation.