# Wikimedia Foundation Mediawiki WikiLambda extension vulnerabilities

Source: https://junglewise.ai/threats/technologies/mediawiki-wikilambda-extension  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/mediawiki-wikilambda-extension.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in Wikimedia Foundation Mediawiki WikiLambda extension: 0 in the last 7 days and 4 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-103046, was published on 29 September 2026. Nothing in the last four weeks, down from 4 vulnerabilities in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 4
- All time: 4 (0 critical, 0 exploited in the wild)

## About Wikimedia Foundation Mediawiki WikiLambda extension

MediaWiki extension for WikiLambda that enables abstract function definitions in wikis.

## Latest Wikimedia Foundation Mediawiki WikiLambda extension vulnerabilities

- [CVE-2026-103046: Wikimedia MediaWiki WikiLambda stored cross-site scripting](https://junglewise.ai/threats/cve-2026-103046-improper-neutralization-of-input-during-web-page-generation) (info, published 29 Sep 2026)
- [CVE-2026-100383: Mediawiki WikiLambda extension stored XSS in Visual Editor integration](https://junglewise.ai/threats/cve-2026-100383-improper-neutralization-of-input-during-web-page-generation-xss) (info, published 25 Sep 2026)
- [CVE-2026-100377: MediaWiki WikiLambda information disclosure in revision handling](https://junglewise.ai/threats/cve-2026-100377-exposure-of-sensitive-information-to-an-unauthorized-actor) (info, published 25 Sep 2026)
- [CVE-2026-96872: Wikimedia MediaWiki WikiLambda privilege escalation](https://junglewise.ai/threats/cve-2026-96872-improper-handling-of-insufficient-permissions-or-privileges) (info, published 23 Sep 2026)

## Most severe Wikimedia Foundation Mediawiki WikiLambda extension vulnerabilities

- [CVE-2026-96872: Wikimedia MediaWiki WikiLambda privilege escalation](https://junglewise.ai/threats/cve-2026-96872-improper-handling-of-insufficient-permissions-or-privileges) (info, published 23 Sep 2026)
- [CVE-2026-103046: Wikimedia MediaWiki WikiLambda stored cross-site scripting](https://junglewise.ai/threats/cve-2026-103046-improper-neutralization-of-input-during-web-page-generation) (info, published 29 Sep 2026)
- [CVE-2026-100383: Mediawiki WikiLambda extension stored XSS in Visual Editor integration](https://junglewise.ai/threats/cve-2026-100383-improper-neutralization-of-input-during-web-page-generation-xss) (info, published 25 Sep 2026)
- [CVE-2026-100377: MediaWiki WikiLambda information disclosure in revision handling](https://junglewise.ai/threats/cve-2026-100377-exposure-of-sensitive-information-to-an-unauthorized-actor) (info, published 25 Sep 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 4 vulnerabilities in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 3 | 0 | 0 |
| 28 Sep 2026 | 1 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Wikimedia Foundation technologies

- [Wikimedia Foundation Mediawiki](https://junglewise.ai/threats/technologies/mediawiki): 21 vulnerabilities
- [Wikimedia Foundation Cargo Extension](https://junglewise.ai/threats/technologies/cargo-extension): 4 vulnerabilities
- [Wikimedia Foundation CheckUser](https://junglewise.ai/threats/technologies/checkuser): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Wikimedia Foundation Mediawiki WikiLambda extension vulnerabilities", https://junglewise.ai/threats/technologies/mediawiki-wikilambda-extension, 9 November 2026.