{"id":"CVE-2026-103442","state":"PUBLISHED","title":"MergeAccount PHP object injection via session-key substitution","description":"External control of system or configuration setting vulnerability in The Wikimedia Foundation MediaWiki CentralAuth extension allows Code Injection.\n\nThis issue affects MediaWiki CentralAuth extension: 1.46, 1.45, and 1.43.","publishedAt":"2026-09-30T16:09:40.369Z","updatedAt":"2026-09-30T16:09:40.369Z","severity":{"score":7.2,"label":"High","version":"4.0","vector":"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/S:N/AU:Y/R:U/V:D/RE:M/U:Amber","source":"wikimedia-foundation"},"assigner":"wikimedia-foundation","products":["The Wikimedia Foundation MediaWiki CentralAuth extension"],"affected":[{"vendor":"The Wikimedia Foundation","product":"MediaWiki CentralAuth extension","defaultStatus":"unaffected","versions":[{"version":"1.46","status":"affected"},{"version":"1.45","status":"affected"},{"version":"1.43","status":"affected"}],"repo":"https://gerrit.wikimedia.org/r/mediawiki/extensions/CentralAuth"}],"references":["https://phabricator.wikimedia.org/T435624","https://gerrit.wikimedia.org/r/q/I9c59e5c3f217c1eaa02934a076604049bac2b025"],"weaknesses":["CWE-15"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/103xxx/CVE-2026-103442.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-103442","state":"PUBLISHED","datePublished":"2026-09-30T16:09:40.369Z","dateUpdated":"2026-09-30T16:09:40.369Z","assignerShortName":"wikimedia-foundation","assignerOrgId":"c4f26cc8-17ff-4c99-b5e2-38fc1793eacc","dateReserved":"2026-09-30T15:41:01.270Z"},"containers":{"cna":{"title":"MergeAccount PHP object injection via session-key substitution","descriptions":[{"lang":"en","value":"External control of system or configuration setting vulnerability in The Wikimedia Foundation MediaWiki CentralAuth extension allows Code Injection.\n\nThis issue affects MediaWiki CentralAuth extension: 1.46, 1.45, and 1.43."}],"affected":[{"vendor":"The Wikimedia Foundation","product":"MediaWiki CentralAuth extension","defaultStatus":"unaffected","versions":[{"version":"1.46","status":"affected"},{"version":"1.45","status":"affected"},{"version":"1.43","status":"affected"}],"repo":"https://gerrit.wikimedia.org/r/mediawiki/extensions/CentralAuth"}],"references":[{"url":"https://phabricator.wikimedia.org/T435624"},{"url":"https://gerrit.wikimedia.org/r/q/I9c59e5c3f217c1eaa02934a076604049bac2b025"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"HIGH","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"HIGH","vulnAvailabilityImpact":"LOW","subAvailabilityImpact":"LOW","exploitMaturity":"PROOF_OF_CONCEPT","Safety":"NEGLIGIBLE","Automatable":"YES","Recovery":"USER","valueDensity":"DIFFUSE","vulnerabilityResponseEffort":"MODERATE","providerUrgency":"AMBER","version":"4.0","baseSeverity":"HIGH","baseScore":7.2,"vectorString":"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/S:N/AU:Y/R:U/V:D/RE:M/U:Amber"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-15","lang":"en","description":"CWE-15 External control of system or configuration setting","type":"CWE"}]}],"providerMetadata":{"shortName":"wikimedia-foundation","orgId":"c4f26cc8-17ff-4c99-b5e2-38fc1793eacc","dateUpdated":"2026-09-30T16:09:40.369Z"},"impacts":[{"capecId":"CAPEC-242","descriptions":[{"lang":"en","value":"CAPEC-242 Code Injection"}]}],"credits":[{"lang":"en","value":"Marco Paciaroni (BomboBombone)","type":"reporter"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.5"}}}}}