CVE-2026-100241: Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation
Source GCVE Database
Not known to be exploited · CVSS 7.5 High.
Data as of 13 Nov 2026, 23:53 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 24% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 29 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Wikimedia FoundationMediawiki - EventBus Extension | Affected
| Fixed in– |
AI-suggested
Until a fix is available, restrict access to the affected version 1.47.0-alpha of the EventBus Extension and monitor for updates from the Wikimedia Foundation.
Description
A vulnerability in the Wikimedia Foundation Mediawiki EventBus Extension version 1.47.0-alpha allows unauthorized actors to access sensitive information. This exposure is classified under CWE-200, indicating information disclosure. No patch or remediation guidance is currently available, and no CVSS score has been assigned. The vulnerability is considered high severity based on the nature of the exposure.