CVE-2026-103446
WikiLambda exposes anonymous execution of unsaved Abstract Wikipedia fragments
- Published
- Sep 30, 2026
- Updated
- Oct 6, 2026
- Assigning CNA
- wikimedia-foundation
- Evidence observed
- Oct 3, 2026
Primary CVSS
nvd · CVSS 4.0
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:U/V:C/RE:M/U:AmberLow · next 30 days
- Percentile
- 25.7%
- Model date
- Oct 25, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Authorization bypass through User-Controlled key vulnerability in The Wikimedia Foundation MediaWiki WikiLambda extension allows Authentication Bypass. This issue affects MediaWiki WikiLambda extension: 1.46.
Sources
Report summary and local proof-of-concept script demonstrating the unauthenticated WikiLambda fragment execution flaw in CVE-2026-103446.
Responsible use
Use vulnerability information only on systems you own or are authorized to test. Kitploit links to public research metadata and does not store exploit code or malicious payloads.