What is CVE-2026-103446?

CVE-2026-103446 is a vulnerability in The Wikimedia Foundation MediaWiki Wikilambda Extension, classified under Authorization Bypass Through User-Controlled Key. Published 2026-09-30.

Is CVE-2026-103446 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in The Wikimedia Foundation MediaWiki Wikilambda Extension

CVE-2026-103446

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.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-09-30 · last modified 2026-09-30.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

The Wikimedia Foundation MediaWiki Wikilambda Extension — versions 1.46

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

Public proof-of-concept exploits

BomboBombone/CVE-2026-103446

References

Frequently asked questions

What is CVE-2026-103446?: CVE-2026-103446 is a vulnerability in The Wikimedia Foundation MediaWiki Wikilambda Extension, classified under Authorization Bypass Through User-Controlled Key. Published 2026-09-30.
Is CVE-2026-103446 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.