Is CVE-2026-100241 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-100241 being exploited in the wild.

How severe is CVE-2026-100241?

Informational severity, published 29 September 2026.

Which products and versions are affected?

Wikimedia Foundation MediaWiki EventBus extension 1.47.0-alpha.

Is there a fix for CVE-2026-100241?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-100241 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-100241?

Check whether you run Wikimedia Foundation MediaWiki EventBus extension at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-100241: Wikimedia MediaWiki EventBus extension information disclosure

CVE-2026-100241 · Severity: info · Published 2026-09-29

The EventBus extension for Wikimedia MediaWiki (a collaborative wiki platform) exposes sensitive information to unauthorized users through an information disclosure vulnerability. An attacker could access data that should remain private or restricted, potentially compromising the confidentiality of wiki operations and user data.

Vendors: Wikimedia Foundation.

Quick answers

Is CVE-2026-100241 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-100241 being exploited in the wild.
How severe is CVE-2026-100241?: Informational severity, published 29 September 2026.
Which products and versions are affected?: Wikimedia Foundation MediaWiki EventBus extension 1.47.0-alpha.
Is there a fix for CVE-2026-100241?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-100241 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-100241?: Check whether you run Wikimedia Foundation MediaWiki EventBus extension at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

This is an information disclosure vulnerability in the Wikimedia MediaWiki EventBus extension version 1.47.0-alpha. The vulnerability allows sensitive information to be exposed to unauthorized actors via the EventBus component. An attacker with network access can exploit this to retrieve restricted information without proper authorization.

Affected products

Wikimedia Foundation MediaWiki EventBus extension 1.47.0-alpha

Timeline

2026-09-29: disclosed

References

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