---
id: "GHSA-pjr3-86v4-5p7w"
kind: "vulnerability"
aliases: ["GHSA-pjr3-86v4-5p7w", "GO-2026-6745"]
title: "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) in code.vikunja.io/api"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "code.vikunja.io/api", "fixed": [], "affected": "all versions", "ecosystem": "go"}]
ecosystems: ["go"]
tags: ["go", "package", "self-hosted", "vikunja"]
not_affected_if: ["no-project-sharing-in-use"]
published_at: "2026-10-19T21:08:26+00:00"
first_seen_at: "2026-10-23T19:13:08+00:00"
updated_at: "2026-10-23T20:15:24+00:00"
sources: [{"source": "govuln", "url": "https://pkg.go.dev/vuln/GO-2026-6745", "first_seen_at": "2026-10-23T19:13:08+00:00"}]
---

# 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) in code.vikunja.io/api

Vikunja's Go API module (code.vikunja.io/api) silently overrides an explicit lower-permission share on a sub-project with the higher permission inherited from the parent project. A user who was intentionally given restricted access to a sub-project can end up with more access than the owner set.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- go:code.vikunja.io/api affected all versions fixed ?

## Timeline

- 2026-10-23T19:13:08+00:00 govuln https://pkg.go.dev/vuln/GO-2026-6745

## From the sources

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) in code.vikunja.io/api

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_