---
id: CVE-2026-100377
title: >-
  Exposure of Sensitive Information to an Unauthorized Actor vulnerability in
  Wikimedia Foundation Mediawiki - WikiLambda Extension allows Excavation.


  This issue affects Mediawiki - WikiLambda Extension: 1.47.0-alpha
summary: >-
  Exposure of Sensitive Information to an Unauthorized Actor vulnerability in
  Wikimedia Foundation Mediawiki - WikiLambda Extension allows Excavation.


  This issue affects Mediawiki - WikiLambda Extension: 1.47.0-alpha. The issue
  has been r…
severity: medium
cvss: 6.9
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-200
vendor: Wikimedia Foundation
product: Mediawiki - WikiLambda Extension
affected:
  - mediawiki_-_wikilambda_extension 1.47.0-alpha
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T21:17:21.650'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100377'
references:
  - url: 'https://gerrit.wikimedia.org/r/c/mediawiki/extensions/WikiLambda/+/1320186'
    label: c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
  - url: 'https://phabricator.wikimedia.org/T430601'
    label: c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-09-25T21:19:40.140Z'
---

## Overview

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Mediawiki - WikiLambda Extension allows Excavation.

This issue affects Mediawiki - WikiLambda Extension: 1.47.0-alpha. The issue has been remediated on the `master` branch.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.