What’s Vulnerable › Vulnerabilities

CVE-2026-52893: Wekan: OIDC Account Takeover via Unconditional Email-Based Account Merge in onCreateUser hook

• Severity: critical (CVSS 9.2 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-15 · updated 2026-07-18
• Weakness: CWE-287

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.

Affected products

• WeKan: before 9.32

References

• https://github.com/wekan/wekan/commit/73204d4e0a7d77a1b186b3d76e8eaf2f3e7c9fd9
• https://github.com/wekan/wekan/releases/tag/v9.32
• https://github.com/wekan/wekan/security/advisories/GHSA-mp7g-hj5q-gxhq
• https://github.com/wekan/wekan/security/advisories/GHSA-mp7g-hj5q-gxhq

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