CVE-2026-100382
Unauthenticated remote code execution through wikitext in ExternalData
- Published
- Sep 25, 2026
- Updated
- Sep 26, 2026
- Assigning CNA
- wikimedia-foundation
- Evidence observed
- Oct 3, 2026
Primary CVSS
nvd · CVSS 4.0
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/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:XLow · next 30 days
- Percentile
- 68.3%
- Model date
- Oct 25, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
Docker lab reproducing CVE-2026-100382: unauthenticated argument-injection RCE in MediaWiki ExternalData's #get_program_data, with PoC payloads and patch verification.
Responsible use
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