CVE-2026-100241 Wikimedia Foundation Mediawiki - Information Disclosure

Wikimedia Foundation Mediawiki - EventBus Extension 1.47.0-alpha contains an information disclosure vulnerability caused by exposure of sensitive information to unauthorized actors, letting attackers access sensitive data without authorization, exploit requires no special privileges.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.31% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Information Disclosure
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
29 September 2026
Updated
15 October 2026
Weakness
CWE-200

Vendor fix

Update to the latest version of Mediawiki - EventBus Extension.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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