{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53958","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-11T15:50:01.282Z","datePublished":"2026-08-18T21:34:59.454Z","dateUpdated":"2026-08-19T16:12:54.624Z"},"containers":{"cna":{"title":"4gaBoards: SSO Pre-Account Takeover / Hijacking via Mass Assignment","problemTypes":[{"descriptions":[{"cweId":"CWE-287","lang":"en","description":"CWE-287: Improper Authentication","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-915","lang":"en","description":"CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.6,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L","version":"3.1"}}],"references":[{"name":"https://github.com/RARgames/4gaBoards/security/advisories/GHSA-j2fw-r2gj-hfr3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/RARgames/4gaBoards/security/advisories/GHSA-j2fw-r2gj-hfr3"},{"name":"https://github.com/RARgames/4gaBoards/commit/7a79f4c5d338614058515752abd67e49ee2818bb","tags":["x_refsource_MISC"],"url":"https://github.com/RARgames/4gaBoards/commit/7a79f4c5d338614058515752abd67e49ee2818bb"},{"name":"https://github.com/RARgames/4gaBoards/releases/tag/v3.3.9","tags":["x_refsource_MISC"],"url":"https://github.com/RARgames/4gaBoards/releases/tag/v3.3.9"}],"affected":[{"vendor":"RARgames","product":"4gaBoards","versions":[{"version":"< 3.3.9","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-18T21:34:59.454Z"},"descriptions":[{"lang":"en","value":"4gaBoards is a boards system for realtime project management. Prior to 3.3.9, 4gaBoards allows an authenticated user to modify ssoGoogleId, ssoGoogleEmail, ssoGithubId, ssoGithubUsername, ssoGithubEmail, ssoMicrosoftId, ssoMicrosoftEmail, ssoOidcId, and ssoOidcEmail through PATCH /api/users/:id. The whitelist in server/api/controllers/users/update.js mass assigns these backend-managed identity attributes from user input. An attacker can place a victim's provider identifier on an attacker-controlled account, causing the default lookup in helpers such as server/api/helpers/users/get-create-one-for-github-sso.js to match the victim's first SSO login to the attacker's account before the email-linkage flow runs. The victim is logged into the attacker-controlled account, and projects, boards, or data the victim creates remain accessible through the attacker's original local credentials. This issue is fixed in version 3.3.9."}],"source":{"advisory":"GHSA-j2fw-r2gj-hfr3","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/RARgames/4gaBoards/security/advisories/GHSA-j2fw-r2gj-hfr3","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-19T16:11:43.992653Z","id":"CVE-2026-53958","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-19T16:12:54.624Z"}}]}}