MergeAccount PHP object injection via session-key substitution

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-103442
StatePUBLISHED
Assignerwikimedia-foundation
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-30 16:17:10 UTC
Updated2026-09-30 16:27:40 UTC
DescriptionExternal 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.

Risk And Classification

Primary CVSS: v4.0 7.2 HIGH from c4f26cc8-17ff-4c99-b5e2-38fc1793eacc

CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:U/V:D/RE:M/U:Amber

Problem Types: CWE-15 | CWE-15 CWE-15 External control of system or configuration setting

VersionSourceTypeScoreSeverityVector
4.0c4f26cc8-17ff-4c99-b5e2-38fc1793eaccSecondary7.2HIGHCVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/E:P/C...
4.0CNACVSS7.2HIGHCVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/E:P/S...

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
High
Attack Requirements
Present
Privileges Required
High
User Interaction
Passive
Confidentiality
High
Integrity
High
Availability
Low
Sub Conf.
High
Sub Integrity
High
Sub Availability
Low

CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:U/V:D/RE:M/U:Amber

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA The Wikimedia Foundation MediaWiki CentralAuth Extension affected 1.46 Not specified
CNA The Wikimedia Foundation MediaWiki CentralAuth Extension affected 1.45 Not specified
CNA The Wikimedia Foundation MediaWiki CentralAuth Extension affected 1.43 Not specified

References

ReferenceSourceLinkTags
phabricator.wikimedia.org/T435624 c4f26cc8-17ff-4c99-b5e2-38fc1793eacc phabricator.wikimedia.org
gerrit.wikimedia.org/r/q/I9c59e5c3f217c1eaa02934a076604049bac2b025 c4f26cc8-17ff-4c99-b5e2-38fc1793eacc gerrit.wikimedia.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Marco Paciaroni (BomboBombone) (en)

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