Medium severity · published Sep 24, 2026
CVE-2026-96873
Reflected XSS in CirrusSearch debug explain output
5.5
CVSS
0.3%
EPSS
No
On KEV
Description
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Mediawiki - CirrusSearch extension allows Reflected XSS.
This issue affects Mediawiki - CirrusSearch extension through 1.46.0.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
Mediawiki - CirrusSearch Extension · The Wikimedia Foundation
through 1.46.0 · source: vendor
Affected product
MC
Mediawiki - CirrusSearch Extension
The Wikimedia Foundation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-96873
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-96873
gerrit.wikimedia.org
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CirrusSearch/+/1344368
phabricator.wikimedia.org
https://phabricator.wikimedia.org/T435234
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DoS vector through the cirrusbuilddoc query API