High severity · published Sep 30, 2026
CVE-2026-103442
MergeAccount PHP object injection via session-key substitution
7.2
CVSS
0.3%
EPSS
No
On KEV
Description
External control of system or configuration setting vulnerability in The Wikimedia Foundation MediaWiki CentralAuth extension allows Code Injection.
This issue affects MediaWiki CentralAuth extension: 1.46, 1.45, and 1.43.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
MediaWiki CentralAuth extension · The Wikimedia Foundation
1.46; 1.45; 1.43 · source: vendor
Affected product
MC
MediaWiki CentralAuth extension
The Wikimedia Foundation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103442
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103442
phabricator.wikimedia.org
https://phabricator.wikimedia.org/T435624
gerrit.wikimedia.org
https://gerrit.wikimedia.org/r/q/I9c59e5c3f217c1eaa02934a076604049bac2b025
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