{"id":"CVE-2026-57458","title":"Vikunja is an open-source self-hosted task management platform","summary":"Vikunja is an open-source self-hosted task management platform. In version 2.3.0, a scoped API token limited to the `oauth.authorize` permission can call `POST /api/v1/oauth/authorize`, obtain an OAuth authorization code, and exchange th…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-269"],"vendor":"api","product":"code.vikunja.io/api","affected":["code.vikunja.io/api = 2.3.0"],"patched":["code.vikunja.io/api 2.4.0"],"published":"2026-10-09","updated":"2026-10-09","sourceUpdated":"2026-10-09T21:17:05.190","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-57458","references":[{"url":"https://github.com/go-vikunja/vikunja/commit/4ae2e093014881052ed8f8ecd8bcb9adf83dd276","label":"security-advisories@github.com"},{"url":"https://github.com/go-vikunja/vikunja/releases/tag/v2.4.0","label":"security-advisories@github.com"},{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-v3p6-34mc-hj7v","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-v3p6-34mc-hj7v"}],"tags":["nvd","ghsa","go"],"aliases":["GHSA-v3p6-34mc-hj7v"],"ecosystem":"go","ingestedAt":"2026-10-09T21:12:42.335Z","slug":"CVE-2026-57458","body":"## Overview\n\nVikunja is an open-source self-hosted task management platform. In version 2.3.0, a scoped API token limited to the `oauth.authorize` permission can call `POST /api/v1/oauth/authorize`, obtain an OAuth authorization code, and exchange the code at `POST /api/v1/oauth/token` for a normal bearer JSON Web Token (JWT) and refresh token. The resulting credentials are not restricted by the original API token's permissions, allowing access to routes outside its declared scope for the same user. Version 2.4.0 fixes the vulnerability.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-57458)\n\nAffected packages:\n\n- `code.vikunja.io/api = 2.3.0`\n\nPatched in:\n\n- `code.vikunja.io/api 2.4.0`\n\nSource: https://github.com/advisories/GHSA-v3p6-34mc-hj7v","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}