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Vulnerability record · CVE-2026-30847 · published 6 March 2026

CVE-2026-30847: Wekan project wekan information exposure vulnerability

WWekan Project · Wekan

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.

9.3 CVSS 4.0 Critical EPSS 0.41% · top 67.7% CWE-200 · Information exposureCWE-285 · Improper authorization
9.3CVSS 4.0 base score
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/wekan/wekan/commit/1c8667eae8b28739e43569b612ffdb2693c6b1ce Patch
https://github.com/wekan/wekan/releases/tag/v8.34 Release Notes
https://securitylab.github.com/advisories/GHSL-2026-035_Wekan/ Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.3CVE-2026-30844Wekan project wekan server-side request forgery (ssrf) vulnerabilityWekan is an open source kanban tool built with Meteor. Versions 8.32 and 8.33 are vulnerable to Server-Side Request Forgery (SSRF) via attachment URL…EPSS 0.42%9.3CVE-2026-30843Wekan project wekan insecure direct object reference vulnerabilityWekan is an open source kanban tool built with Meteor. Versions 8.32 and 8.33 have a critical Insecure Direct Object Reference (IDOR) issue which cou…EPSS 0.38%8.8CVE-2025-65780Wekan project wekan improper access control vulnerabilityAn issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16. Authenticated users can update their entire…EPSS 0.34%8.7CVE-2026-30846Wekan project wekan information exposure vulnerabilityWekan is an open source kanban tool built with Meteor. In versions 8.31.0 through 8.33, the globalwebhooks publication exposes all global webhook int…EPSS 0.60%8.7CVE-2026-25560Wekan project wekan ldap injection vulnerabilityWeKan versions prior to 8.19 contain an LDAP filter injection vulnerability in LDAP authentication. User-supplied username input is incorporated into…EPSS 0.89%8.2CVE-2025-65781Wekan project wekan improper authentication vulnerabilityAn issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16. Attachment upload API treats the Authorizat…EPSS 0.34%8.1CVE-2025-65778Wekan project wekan cross-site scripting vulnerabilityAn issue was discovered in Wekan The Open Source kanban board system up to version 18.15, fixed in 18.16. Uploaded attachments can be served with att…EPSS 0.38%8.1CVE-2021-3309Wekan project wekan improper certificate validation vulnerabilitypackages/wekan-ldap/server/ldap.js in Wekan before 4.87 can process connections even though they are not authorized by the Certification Authority tr…EPSS 1.7%

Source: NIST National Vulnerability Database (record CVE-2026-30847), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.