CVE-2026-111919
Received Received - Intake

Improper Access Revocation in Vikunja Allows Data Exposure via Webhooks

Publication date: 2026-10-17

Last updated on: 2026-10-17

Assigner: VulnCheck

Description
Vikunja 0.22.0 before 2.7.0 contains an improper access revocation vulnerability that allows removed collaborators to keep receiving project data through webhooks they created. Former collaborators keep receiving task titles and descriptions through their webhook, including content created after their access was revoked.

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Meta Information

Published
2026-10-17
Last Modified
2026-10-17
Generated
2026-10-17
AI Q&A
2026-10-17
EPSS Evaluated
N/A
NVD
CVE-2026-111919
EUVD
EUVD-2026-103287

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
go-vikunja vikunja 0.22.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-613 According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization."

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Executive Summary

Vikunja 0.22.0 before 2.7.0 has an improper access revocation flaw where removed collaborators continue receiving project data via webhooks they created. Even after access is revoked, they still get task titles and descriptions, including new content added post-removal.

Detection Guidance

To detect this vulnerability, check Vikunja installations for versions between 0.22.0 and 2.6.9. Review webhook configurations for projects where collaborators were removed but still receive updates. Look for active webhooks linked to deactivated user accounts or projects.

Impact Analysis

If you use Vikunja and remove collaborators, they may still access sensitive project data through their webhooks. This could lead to unauthorized data exposure, confidentiality breaches, and potential misuse of project information.

Compliance Impact

This vulnerability could violate data protection regulations like GDPR and HIPAA by allowing unauthorized access to sensitive data. Organizations may face compliance failures, legal penalties, and reputational damage due to improper data handling.

Mitigation Strategies

Upgrade Vikunja to version 2.7.0 or later to address the improper access revocation issue. Review and remove any existing webhooks created by former collaborators to prevent continued data transmission.

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