{"cve":"CVE-2026-40103","nvd":{"published":"2026-04-10T17:17:13.143","modified":"2026-10-26T21:10:00.170","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","score":5.4},"cwes":["CWE-836"],"references":["https://github.com/go-vikunja/vikunja/commit/6a0f39b252a81fa4b19dc56dc889183acc9225ae","https://github.com/go-vikunja/vikunja/pull/2584","https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0","https://github.com/go-vikunja/vikunja/security/advisories/GHSA-v479-vf79-mg83"],"products":["vikunja:vikunja"],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-40103","score":0.00222,"percentile":0.12692,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-v479-vf79-mg83","url":"https://osv.dev/vulnerability/GHSA-v479-vf79-mg83","summary":"Vikunja: Scoped API tokens with projects.background permission can delete project backgrounds","modified":"2026-06-25T23:11:19.763837988Z","packages":[{"ecosystem":"Go","name":"code.vikunja.io/api","purl":"pkg:golang/code.vikunja.io/api","ranges":["<2.3.0"],"fixed":["2.3.0"]}]},{"id":"GO-2026-5650","url":"https://osv.dev/vulnerability/GO-2026-5650","summary":"Vikunja: Scoped API tokens with projects.background permission can delete project backgrounds in code.vikunja.io/api","modified":"2026-06-25T23:01:37.356843600Z","packages":[{"ecosystem":"Go","name":"code.vikunja.io/api","purl":"pkg:golang/code.vikunja.io/api","ranges":["all versions"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}