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Advisory record · GHSA-pjr3-86v4-5p7w

Vikunja: Explicit lower-permission share on a sub-project is silently overridden by an inherited parent permission (broken access control / privilege-management regression in v2.6.0)

CVSS 5.3 MediumEPSS 0.0019 · 8th percentile

Published by the GitHub Advisory Database at 9 Oct 2026, 20:57 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
code.vikunja.io/apiGo>=2.6.0, <2.7.02.7.0
Identifiers
GHSA-pjr3-86v4-5p7w · CVE-2026-111920 · GO-2026-6745
Weakness (CWE)
CWE-269 · CWE-284
Tags
Published
9 Oct 2026
Updated
28 Oct 2026

Machine-written summary

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

Vikunja (Go module code.vikunja.io/api) versions 2.6.0 up to 2.7.0 are affected. A user who holds a higher permission on a parent project can keep that inherited permission on a child project even when the owner explicitly shares the child at a lower level, so the restriction is not enforced. Such a user can then modify or delete the child project and re-share it. Upgrade to version 2.7.0.

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
5.3 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0019, the 8th percentile, on 6 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.