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Advisory record · GHSA-w2ch-4xgr-22ww

Vikunja: Task relation deletion does not check read access to the other task, allowing cross-project relation removal

CVSS 4.0, no score published

Published by the GitHub Advisory Database at 9 Oct 2026, 20:54 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
code.vikunja.io/apiGo>=0.9, <2.6.02.6.0
Identifiers
GHSA-w2ch-4xgr-22ww · GO-2026-6754
Weakness (CWE)
CWE-285 · CWE-862
Tags
Published
9 Oct 2026
Updated
19 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Vikunja versions from 0.9 up to but not including 2.6.0 are affected. A user with write access to one project can delete a task relation whose other task sits in a project they cannot read, and the removal also takes the relation away from the other project's members. Exploitation needs an authenticated account with write permission on a shared project; no data is disclosed and no privilege is gained. Upgrade to Vikunja 2.6.0 or later, which is the listed fixed version.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
Not published None 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 14:11 UTC First seen by agentprime
  2. 31 Oct 2026, 14:11 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.