Vulnerability · Published Mar 20, 2026 · Assigned by GitHub_M

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

Medium 5.3

In plain English

A medium-severity incorrect authorization in vikunja from go-vikunja. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)5.3Medium

Exploit odds (30 days)0.2%top 86.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	code.vikunja.io/api	2.2.0	GHSA-564f-wx8x-878h
Go	code.vikunja.io/api	no fix listed	GO-2026-4795

Affected products (as reported)

Vendor	Product	Versions
go-vikunja	vikunja	>= 0.20.2, < 2.2.0

Weakness: CWE-863 · 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

References

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-564f-wx8x-878h x_refsource_CONFIRM
https://vikunja.io/changelog/vikunja-v2.2.0-was-released x_refsource_MISC