Vulnerability in The Wikimedia Foundation MediaWiki - Wikilambda Extension

CVE-2026-96872

Improper handling of insufficient permissions or privileges vulnerability in The Wikimedia Foundation Mediawiki - WikiLambda Extension on Linux, MacOS, and Windows allows Accessing Functionality Not Properly Constrained by ACLs. This issue affects Mediawiki - WikiLambda Extension: before 1.47.0.

Published · last modified .

EPSS exploit prediction

EPSS: 0.003 (28.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-96872: held from 0.002 to 0.003.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2026-96872?
CVE-2026-96872 is a vulnerability in The Wikimedia Foundation MediaWiki - Wikilambda Extension, classified under Improper Handling of Insufficient Permissions or Privileges. Published 2026-09-23.
Is CVE-2026-96872 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.