CVE-2026-103446: CWE-639 Authorization bypass through User-Controlled key in The Wikimedia Foundation MediaWiki WikiLambda extension
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.
AI Analysis
Technical Summary
The MediaWiki WikiLambda extension version 1.46 contains an authorization bypass vulnerability (CWE-639) due to a user-controlled key that allows authentication bypass. This flaw could enable attackers with limited privileges to bypass authorization controls. The vulnerability has a CVSS 4.0 base score of 7.4, indicating high severity. The Wikimedia Foundation has published this vulnerability and provides a patch. As this is a cloud-hosted service, remediation is managed by the vendor.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker with limited privileges to bypass authorization mechanisms, potentially gaining unauthorized access to restricted functionality or data within the WikiLambda extension. The impact is rated high due to the potential for privilege escalation and unauthorized access.
Mitigation Recommendations
A patch is available for this vulnerability. Since the MediaWiki WikiLambda extension is a cloud-hosted service managed by the Wikimedia Foundation, the vendor is responsible for applying the fix. Users should verify with the Wikimedia Foundation that their instances are updated to the patched version or that the cloud service has been remediated.
CVE-2026-103446: CWE-639 Authorization bypass through User-Controlled key in The Wikimedia Foundation MediaWiki WikiLambda extension
Description
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.
CVSS v4.0
Score 7.4high
Affected software
The Wikimedia Foundation
MediaWiki WikiLambda extension
pkg:github/wikimedia/mediawiki-wikilambda-extensionRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The MediaWiki WikiLambda extension version 1.46 contains an authorization bypass vulnerability (CWE-639) due to a user-controlled key that allows authentication bypass. This flaw could enable attackers with limited privileges to bypass authorization controls. The vulnerability has a CVSS 4.0 base score of 7.4, indicating high severity. The Wikimedia Foundation has published this vulnerability and provides a patch. As this is a cloud-hosted service, remediation is managed by the vendor.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker with limited privileges to bypass authorization mechanisms, potentially gaining unauthorized access to restricted functionality or data within the WikiLambda extension. The impact is rated high due to the potential for privilege escalation and unauthorized access.
Mitigation Recommendations
A patch is available for this vulnerability. Since the MediaWiki WikiLambda extension is a cloud-hosted service managed by the Wikimedia Foundation, the vendor is responsible for applying the fix. Users should verify with the Wikimedia Foundation that their instances are updated to the patched version or that the cloud service has been remediated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- wikimedia-foundation
- Date Reserved
- 2026-09-30T15:41:01.270Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Is Cloud Service
- true
Threat ID: 6abe74a8a43b0b3b89bd1dcb
Added to database: 10/01/2026, 14:56:40 UTC
Last enriched: 10/01/2026, 15:01:06 UTC
Last updated: 10/02/2026, 03:48:09 UTC
Views: 15
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.