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Advisory record · GHSA-rj9j-8772-4h6c

Vikunja: Link-share token reads any tenant's kanban buckets and enumerates usernames/IDs instance-wide (BOLA)

CVSS 9.3 CriticalCriticalEPSS 0.0033 · 26th percentile

Critical, because:

  • CVSS score 9.3: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 9 Oct 2026, 20:42 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
code.vikunja.io/apiGo>=0.24.0, <2.4.02.4.0
Identifiers
GHSA-rj9j-8772-4h6c · CVE-2026-68582 · GO-2026-6749
Weakness (CWE)
CWE-639 · CWE-863
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 0.24.0 before 2.4.0 are affected. A holder of a link-share token for any one project can request the kanban view tasks endpoint with another project's view ID and receive that view's bucket titles and the creating user's username, name and ID, across the instance. The same request shows whether a project and view ID pair exists, which also works for ordinary authenticated users. Upgrade to version 2.4.0 or later, which is listed as the fix.

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
9.3 Critical 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0033, the 26th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

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.