CVE-2026-39840

5.1 mediumEPSS 0.2%

Medium (5.1) in mediawiki cargo. EPSS 0.2% chance of exploitation in the next 30 days.

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Wikimedia Foundation Mediawiki - Cargo Extension allows XSS Targeting Non-Script Elements.This issue affects Mediawiki - Cargo Extension: before 3.8.7.

Severity

CVSS 4.0

5.1 medium

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS 3.1

6.1 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 4% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-04-07
Modified: 2026-07-24
Record from: the NVD, synced 2026-10-19

Affected

mediawiki:cargo

References

https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/1237966
https://phabricator.wikimedia.org/T416368

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