CVE-2026-100377: CWE-200 Exposure of Sensitive Information to an Unauthorized Actor in Wikimedia Foundation Mediawiki - WikiLambda Extension
CVE-2026-100377 is a medium severity vulnerability in the Wikimedia Foundation's Mediawiki - WikiLambda Extension version 1.47.0-alpha. It involves exposure of sensitive information to unauthorized actors. The issue has been fixed in the master branch. No known exploits are reported in the wild.
AI Analysis
Technical Summary
This vulnerability, classified as CWE-200, allows unauthorized actors to access sensitive information in the Mediawiki - WikiLambda Extension version 1.47.0-alpha. The vulnerability has been addressed and remediated in the master branch of the codebase. The CVSS 4.0 score is 6.9, indicating a medium severity with network attack vector, low complexity, no privileges or user interaction required, and low impact on confidentiality.
Potential Impact
Unauthorized actors may gain access to sensitive information due to this vulnerability, which could lead to information disclosure. However, the impact is limited to information exposure without further integrity or availability impact. There are no known active exploits in the wild.
Mitigation Recommendations
A patch is available and the issue has been remediated in the master branch. Users of version 1.47.0-alpha should upgrade to the fixed version from the master branch or later to mitigate this vulnerability. Since this is a cloud service, the vendor manages remediation for hosted instances; verify with the vendor advisory for current status.
CVE-2026-100377: CWE-200 Exposure of Sensitive Information to an Unauthorized Actor in Wikimedia Foundation Mediawiki - WikiLambda Extension
Description
CVE-2026-100377 is a medium severity vulnerability in the Wikimedia Foundation's Mediawiki - WikiLambda Extension version 1.47.0-alpha. It involves exposure of sensitive information to unauthorized actors. The issue has been fixed in the master branch. No known exploits are reported in the wild.
CVSS v4.0
Score 6.9medium
Affected software
Wikimedia Foundation
Mediawiki - WikiLambda Extension
pkg:github/wikimedia/mediawiki/extensions/WikiLambdaRun 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
This vulnerability, classified as CWE-200, allows unauthorized actors to access sensitive information in the Mediawiki - WikiLambda Extension version 1.47.0-alpha. The vulnerability has been addressed and remediated in the master branch of the codebase. The CVSS 4.0 score is 6.9, indicating a medium severity with network attack vector, low complexity, no privileges or user interaction required, and low impact on confidentiality.
Potential Impact
Unauthorized actors may gain access to sensitive information due to this vulnerability, which could lead to information disclosure. However, the impact is limited to information exposure without further integrity or availability impact. There are no known active exploits in the wild.
Mitigation Recommendations
A patch is available and the issue has been remediated in the master branch. Users of version 1.47.0-alpha should upgrade to the fixed version from the master branch or later to mitigate this vulnerability. Since this is a cloud service, the vendor manages remediation for hosted instances; verify with the vendor advisory for current status.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- wikimedia-foundation
- Date Reserved
- 2026-09-25T19:28:11.982Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Is Cloud Service
- true
Threat ID: 6ab7268cf7a7c54106b91936
Added to database: 09/26/2026, 01:57:32 UTC
Last enriched: 09/26/2026, 01:58:04 UTC
Last updated: 09/26/2026, 03:21:35 UTC
Views: 5
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