CVE-2026-52893 PUBLISHED

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

Assigner: GitHub_M
Reserved: 08.06.2026 Published: 15.07.2026 Updated: 15.07.2026

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.

Metrics

CVSS 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
CVSS Score: 9.2

Product Status

Vendor wekan
Product wekan
Versions
  • Version < 9.32 is affected

References

Problem Types

  • CWE-287: Improper Authentication CWE