Vulnerability · Published Sep 23, 2026 · Assigned by wikimedia-foundation

CVE-2026-96872WikiLambda public function execution bypasses the unsaved-code permission through nested Z825 compositions

Low 2.9

In plain English

A low-severity security flaw in Mediawiki - WikiLambda Extension from The Wikimedia Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 4.0)2.9Low

Exploit odds (30 days)0.3%top 71.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack tooling1Public PoC

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
The Wikimedia Foundation	Mediawiki - WikiLambda Extension	0 – before 1.47.0

Weakness: CWE-280 · Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:P/AU:Y

In plain English

Official description

Affected products (as reported)

References