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Advisory record · GHSA-3hc7-r24j-rpwc

Vikunja: Cross-project task disclosure through subtask expansion

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<2.6.02.6.0
Identifiers
GHSA-3hc7-r24j-rpwc · GO-2026-6714
Weakness (CWE)
CWE-200 · 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 before 2.6.0 expose tasks from projects the caller cannot access. When a task list is requested with subtask expansion, linked subtasks are returned without the project-access check applied to the main listing, so a user with read-only access to one project can read full task data from a private project that is linked as a subtask. Upgrade to Vikunja 2.6.0 or later, which applies the same access filter to expanded subtasks.

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:H/VI:N/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.