CVE-2026-123503 · Package
NO FIX YET · SEE WHAT TO DO
Vikunja, a self-hosted task manager, checks bucket permissions against the wrong view, so a user with write access to a project can delete a bucket through another view's endpoint. This bypasses the rule that a project must keep at least one bucket and leaves task buckets and default/done references inconsistent.
first public Oct 22, 2026 · 1 source
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Teams that run a self-hosted Vikunja instance where several users have write access to shared projects. A single-user instance or one where only trusted people can write to projects is less exposed. The sources do not describe exposure on hosted Vikunja.
Not affected if managed-hosting, read-only-projects, single-user
Who cares project-management, self-hosted, vikunja
vikunja version or the image tag, and compare it with the fixed version below.2.7.1 or later (the description says before 2.7.1 is affected).Vikunja before 2.7.1 contains an improper authorization vulnerability in canDoBucket that allows users with project write access to delete buckets via a mismatched view ID. Attackers can request deletion through another view's bucket endpoint to bypass the last-bucket rule, leaving dangling default/done bucket references and inconsistent task buckets.
This page as .md · .json · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/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:X/V:X/RE:X/U:X
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