10

CVE-2026-100382: wikimedia foundation mediawiki - externaldata extension OS Command Injection

CVSS: 10.0v4.0CriticalAwaiting analysis
Published 25-09-2026Last modified 26-09-2026
Open JSON

Vulnerability summary

CVE-2026-100382 is a critical (CVSS 10.0) OS Command Injection vulnerability in wikimedia foundation mediawiki - externaldata extension. EPSS estimates a 0.95% chance of exploitation in the next 30 days, higher than 60.7% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
10.0/10
010
Critical · v4.0 (CVE.org)
EPSS score
0.95%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 25-09-2026
    PublishedVulnerability first disclosed.
  2. 26-09-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.95%

Chance of exploitation in the next 30 days

Percentile

61%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

26-09-202621-10-2026
EPSS score
0.95%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Wikimedia foundation1 product

1 vendor · 1 product

References

2 links