Medium severity · published Jul 1, 2026
CVE-2026-58519
Stored XSS through Cargo's map format
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - Cargo Extension allows Stored XSS.
This issue affects Mediawiki - Cargo Extension: from * before 3.9.1.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
Mediawiki - Cargo Extension · The Wikimedia Foundation
before 3.9.1 · source: vendor
CA
Cargo · Mediawiki
before 3.9.1 · source: NVD
Affected product
MC
Mediawiki - Cargo Extension
The Wikimedia Foundation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-58519
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-58519
Issue Tracking
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/1277612
Issue Tracking
https://phabricator.wikimedia.org/T424140
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