Vulnerability DatabaseCVE-2026-111918
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CVE-2026-111918
Published:October 17, 2026
Updated:October 19, 2026
Vikunja from 1.0.0-rc0 before 2.7.0 contains an improper authorization vulnerability in RecalculateTaskPositions that allows authenticated users with zero accessible projects to write task_positions rows for all tasks instance-wide. Attackers can delete their Inbox after repointing default_project_id, then create empty-filter saved filters to persist cross-tenant references and amplify writes for denial of service.
Affected Packages
https://github.com/go-vikunja/vikunja.git (GITHUB):
Affected version(s) >=v1.0.0 <v2.7.0
Fix Suggestion:
Update to version v2.7.0
Related Resources (5)
https://nvd.nist.gov/vuln/detail/CVE-2026-111918
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111918.json
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fprf-r6rv-xg99
https://github.com/go-vikunja/vikunja
https://www.vulncheck.com/advisories/vikunja-1.0.0-rc0-before-2.7.0-cross-tenant-task-position-writes-via-saved-filter-creation
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CVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
LOW
Weakness Type (CWE)
Incorrect Authorization
CWE-863
EPSS
Base Score:
0.18