CVE-2026-100382

Unauthenticated remote code execution through wikitext in ExternalData

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.

Affected

Wikimedia Foundation · Mediawiki - ExternalData Extension

CVSS v4.0 CNA

10.0 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS

0.95% chance of exploitation in the next 30 days, 60th percentile

Published

2026-09-25

Updated

2026-09-26

Proof-of-concept exploits (1)

• nth347/mediawiki-CVE-2026-1003824★ · 2026-09-27

References

• CVE Record
• NVD entry

Related

• CVE-2013-2251
• CVE-2018-12636
• CVE-2018-20148
• CVE-2018-3810
• CVE-2019-9621
• CVE-2019-9670