WikiLambda public function execution bypasses the unsaved-code permission through nested Z825 compositions (CVE-2026-96872) | HOL Guard CVE

Low · CVSS 2.9CVE-2026-96872

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

Answer in brief

CVE-2026-96872 records a Low severity (CVSS 2.9) vulnerability in WikiLambda public function execution bypasses the unsaved-code permission through nested Z825 compositions. The current sources do not mark it as known exploited. The current feed maps The Wikimedia Foundation/Mediawiki - WikiLambda Extension (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 23, 2026Updated Sep 23, 2026Source checked Sep 23, 2026First seen by HOL Sep 23, 2026Material review Sep 23, 2026

Upstream Advisory

Key facts

Risk: Low · CVSS 2.9
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 2.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps The Wikimedia Foundation/Mediawiki - WikiLambda Extension (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
The Wikimedia Foundation/Mediawiki - WikiLambda Extensiongeneric	>=0 <1.47.0	1.47.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for The Wikimedia Foundation/Mediawiki - WikiLambda Extension.
Review the reported fix. Update The Wikimedia Foundation/Mediawiki - WikiLambda Extension to 1.47.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 23, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.