CVE-2026-100382criticalobserved exploitationCWE-78

CVE-2026-100382: critical vulnerability in Wikimedia Foundation Mediawiki - ExternalData…

Unauthenticated remote code execution through wikitext in ExternalData

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70Vexday Risk Score

Prioritize patching. It exploitation observed in the wild and has a public proof of concept.

ssvc Actcvss 10epss 1.2%
from disclosure to weapon2 days
Published on NVDSep 25
1st PoC+2d
Observed exploitation+2d
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Wikimedia Foundation Mediawiki - ExternalData Extension allows OS Command Injection. This issue affects Mediawiki - ExternalData Extension: from * before 3.7.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Affected products
Wikimedia Foundation · Mediawiki - ExternalData Extension
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