{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52893","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-08T21:44:27.366Z","datePublished":"2026-07-15T21:12:11.088Z","dateUpdated":"2026-07-18T02:35:24.728Z"},"containers":{"cna":{"title":"Wekan: OIDC Account Takeover via Unconditional Email-Based Account Merge in onCreateUser hook","problemTypes":[{"descriptions":[{"cweId":"CWE-287","lang":"en","description":"CWE-287: Improper Authentication","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":9.2,"baseSeverity":"CRITICAL","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/wekan/wekan/security/advisories/GHSA-mp7g-hj5q-gxhq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/wekan/wekan/security/advisories/GHSA-mp7g-hj5q-gxhq"},{"name":"https://github.com/wekan/wekan/commit/73204d4e0a7d77a1b186b3d76e8eaf2f3e7c9fd9","tags":["x_refsource_MISC"],"url":"https://github.com/wekan/wekan/commit/73204d4e0a7d77a1b186b3d76e8eaf2f3e7c9fd9"},{"name":"https://github.com/wekan/wekan/releases/tag/v9.32","tags":["x_refsource_MISC"],"url":"https://github.com/wekan/wekan/releases/tag/v9.32"}],"affected":[{"vendor":"wekan","product":"wekan","versions":[{"version":"< 9.32","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-15T21:12:11.088Z"},"descriptions":[{"lang":"en","value":"Wekan is open source kanban built with Meteor. Prior to 9.32, the Wekan Accounts.onCreateUser hook in server/models/users.js merges OIDC logins into existing accounts when the OIDC email or username matches an existing Wekan user, without verifying ownership or checking email_verified. An attacker using an OIDC provider account with a victim's email or username can cause Wekan to merge the attacker's OIDC credentials into the victim account and then log in as that account. This issue is fixed in version 9.32."}],"source":{"advisory":"GHSA-mp7g-hj5q-gxhq","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/wekan/wekan/security/advisories/GHSA-mp7g-hj5q-gxhq","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-18T02:34:45.311092Z","id":"CVE-2026-52893","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"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":"2026-07-18T02:35:24.728Z"}}]}}