CVE-2026-30847 Wekan Credential Leak via notificationUsers Publication Exposes Password Hashes and Session Tokens
Authenticated users can harvest password hashes and session tokens from other users due to unfiltered data publication, enabling account takeover.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-30847?
CVE-2026-30847 is a critical vulnerability in Wekan, published on 6 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Wekan is an open source kanban tool built with Meteor. In versions 8.31.0 through 8.33, the notificationUsers publication in Wekan publishes user documents with no field filtering, causing the ReactiveCache.getUsers() call to return all fields including highly sensitive data such as bcrypt password hashes, active session login tokens, email verification tokens, full email addresses, and any stored OAuth tokens. Unlike Meteor's default auto-publication which strips the services field for security, custom publications return whatever fields the cursor contains, meaning all subscribers receive the complete user documents. Any authenticated user who triggers this publication can harvest credentials and active session tokens for other users, enabling password cracking, session hijacking, and full account takeover. This issue has been fixed in version 8.34.
Which versions are affected by CVE-2026-30847?
It affects 1 product.
Products include Wekan Project Wekan.
How do I fix CVE-2026-30847?
No fix has been published for CVE-2026-30847 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-30847 being exploited?
There is no known exploitation of CVE-2026-30847 in the wild and no public exploit code.
Other vulnerabilities in Wekan
- CVE-2026-30843 Wekan has Cross-Board IDOR in Custom Fields Update Endpoints
- CVE-2026-30844 Wekan Vulnerable to SSRF through Lack of Validation or Filtering in Attachment URL Loading
- CVE-2025-65780 Missing authorization in n/a
- CVE-2026-30846 Wekan Exposes All Global Webhook Integrations through globalwebhooks Publication
- CVE-2026-25560 WeKan < 8.19 LDAP Authentication Filter Injection