Is CVE-2026-100244 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-100244 being exploited in the wild.

How severe is CVE-2026-100244?

Informational severity, published 29 September 2026.

Which products and versions are affected?

Wikimedia Foundation MediaWiki CentralAuth Extension before 1.46.1, 1.45.5, 1.43.10.

Is there a fix for CVE-2026-100244?

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-2026-100244 attacked?

It is attacked over the network.

Am I affected by CVE-2026-100244?

Check whether you run Wikimedia Foundation MediaWiki CentralAuth 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-2026-100244: MediaWiki CentralAuth Extension sensitive information exposure

CVE-2026-100244 · Severity: info · Published 2026-09-29

MediaWiki's CentralAuth extension, which manages centralized user authentication across multiple wiki sites, contains a vulnerability that exposes sensitive information to unauthorized users. This could allow attackers to gain access to account details or other private data that should be restricted. The issue affects multiple versions of the extension, though exploits in the wild have not been documented.

Vendors: Wikimedia Foundation.

Quick answers

Is CVE-2026-100244 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-100244 being exploited in the wild.
How severe is CVE-2026-100244?: Informational severity, published 29 September 2026.
Which products and versions are affected?: Wikimedia Foundation MediaWiki CentralAuth Extension before 1.46.1, 1.45.5, 1.43.10.
Is there a fix for CVE-2026-100244?: 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-2026-100244 attacked?: It is attacked over the network.
Am I affected by CVE-2026-100244?: Check whether you run Wikimedia Foundation MediaWiki CentralAuth 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

The CentralAuth extension is vulnerable to information disclosure that permits unauthorized access to sensitive data. The vulnerability exists in versions prior to 1.46.1, 1.45.5, and 1.43.10. Limited technical detail is available from the references, but patches have been prepared across multiple release branches.

Affected products

Wikimedia Foundation MediaWiki CentralAuth Extension before 1.46.1, 1.45.5, 1.43.10

Timeline

2026-09-29: disclosed

References

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