CVE-2026-40103

Published: Apr 10, 2026Modified: Jun 17, 2026

5.4

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Exploitability: 2.8 / Impact: 2.5

Source: NVD

Description

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, Vikunja's scoped API token enforcement for custom project background routes is method-confused. A token with only projects.background can successfully delete a project background, while a token with only projects.background_delete is rejected. This is a scoped-token authorization bypass. This vulnerability is fixed in 2.3.0.

Affected (1)

Products: Vikunja: Vikunja

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Vikunja Vikunja	Before 2.3.0

Related CWEs

Use of Password Hash Instead of Password for Authentication

The product records password hashes in a data store, receives a hash of a password from a client, and compares the supplied hash to the hash obtained from the data store.

References (4)

https://github.com/go-vikunja/vikunja/commit/6a0f39b252a81fa4b19dc56dc889183acc9225ae

Source: security-advisories@github.com

Patch

https://github.com/go-vikunja/vikunja/pull/2584

Source: security-advisories@github.com

Issue Tracking

https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0

Source: security-advisories@github.com

Release Notes

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-v479-vf79-mg83

Source: security-advisories@github.com

ExploitVendor Advisory

Timeline

No history available yet.