CVE-2026-111918

Medium

Description

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.

SeverityMedium

CVSS5.4

Exploit probability—

ProductCode.vikunja.io/api

PublishedOct 17, 2026

First seenOct 17, 2026

Weakness typeCWE-863Incorrect authorization

How to fix

Update

code.vikunja.io/api2.7.0 or later

Vendor advisories

github.com/go-vikunja/vikunja/security/advisories/GHSA-fprf-r6rv-xg99

Affected products

Product	Affected versions	Fixed in
code.vikunja.io/apiGo	1.0.0-rc0 ≤ v < 2.7.0, No range specified	2.7.0

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