Bug 2543304 (CVE-2026-100241)

Summary: CVE-2026-100241 mediawiki: Private change tags exposed to anonymous users via revision-tags-change events
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the MediaWiki EventBus extension, which can lead to information disclosure. An unauthorized remote attacker could exploit this vulnerability over the network without requiring credentials or user interaction. Successful exploitation allows the attacker to access sensitive information that should otherwise be restricted.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-09-29 16:54:23 UTC
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Mediawiki - EventBus Extension allows Excavation.

This issue affects Mediawiki - EventBus Extension: 1.47.0-alpha.