---
title: "CVE-2026-100244: Wikimedia Foundation Mediawiki - Exposure of Sensitive Information"
description: "Wikimedia Foundation Mediawiki - CentralAuth Extension < 1.46.1, 1.45.5, 1.43.10 contains an exposure of sensitive information vulnerability caused by improper access control, letting unauthorized actors access sensitive data, exploit requires no special privileges."
url: https://panop.io/threat-heartbeat/CVE-2026-100244/
---

# CVE-2026-100244 Wikimedia Foundation Mediawiki - Exposure of Sensitive Information

Wikimedia Foundation Mediawiki - CentralAuth Extension < 1.46.1, 1.45.5, 1.43.10 contains an exposure of sensitive information vulnerability caused by improper access control, letting unauthorized actors access sensitive data, exploit requires no special privileges.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.26% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-100244)

## Details

Type

Exposure of Sensitive Information

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](https://cwe.mitre.org/data/definitions/200.html)

## Vendor fix

Update to version 1.46.1, 1.45.5, 1.43.10 or later.

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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-100244](https://nvd.nist.gov/vuln/detail/CVE-2026-100244)
- [https://gerrit.wikimedia.org/r/q/Ifd262c11300dd0355e177d6185bcd704d2720a47](https://gerrit.wikimedia.org/r/q/Ifd262c11300dd0355e177d6185bcd704d2720a47)
- [https://phabricator.wikimedia.org/T432789](https://phabricator.wikimedia.org/T432789)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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