{"id":"CVE-2026-52893","state":"PUBLISHED","title":"Wekan: OIDC Account Takeover via Unconditional Email-Based Account Merge in onCreateUser hook","description":"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.","publishedAt":"2026-07-15T21:12:11.088Z","updatedAt":"2026-07-18T02:35:24.728Z","severity":{"score":9.2,"label":"Critical","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["wekan wekan"],"affected":[{"vendor":"wekan","product":"wekan","versions":[{"version":"< 9.32","status":"affected"}]}],"references":["https://github.com/wekan/wekan/security/advisories/GHSA-mp7g-hj5q-gxhq","https://github.com/wekan/wekan/commit/73204d4e0a7d77a1b186b3d76e8eaf2f3e7c9fd9","https://github.com/wekan/wekan/releases/tag/v9.32"],"weaknesses":["CWE-287"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52893.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52893","state":"PUBLISHED","datePublished":"2026-07-15T21:12:11.088Z","dateUpdated":"2026-07-18T02:35:24.728Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-08T21:44:27.366Z"},"containers":{"cna":{"title":"Wekan: OIDC Account Takeover via Unconditional Email-Based Account Merge in onCreateUser hook","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."}],"affected":[{"vendor":"wekan","product":"wekan","versions":[{"version":"< 9.32","status":"affected"}]}],"references":[{"url":"https://github.com/wekan/wekan/security/advisories/GHSA-mp7g-hj5q-gxhq","name":"https://github.com/wekan/wekan/security/advisories/GHSA-mp7g-hj5q-gxhq","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/wekan/wekan/commit/73204d4e0a7d77a1b186b3d76e8eaf2f3e7c9fd9","name":"https://github.com/wekan/wekan/commit/73204d4e0a7d77a1b186b3d76e8eaf2f3e7c9fd9","tags":["x_refsource_MISC"]},{"url":"https://github.com/wekan/wekan/releases/tag/v9.32","name":"https://github.com/wekan/wekan/releases/tag/v9.32","tags":["x_refsource_MISC"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-287","lang":"en","description":"CWE-287: Improper Authentication","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-15T21:12:11.088Z"},"source":{"advisory":"GHSA-mp7g-hj5q-gxhq","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-18T02:35:24.728Z"}}]}}}