{"schema_version":"1.9.0","id":"CVE-2026-28268","published":"2026-02-27T20:16:29.842Z","modified":"2026-08-12T03:51:17.851345160Z","aliases":["GHSA-rfjg-6m84-crj2","GO-2026-4575"],"related":["SUSE-SU-2026:1042-1","openSUSE-SU-2026:21483-1"],"summary":"Vikunja Vulnerable to Account Takeover via Password Reset Token Reuse","details":"Vikunja is an open-source self-hosted task management platform. Versions prior to 2.1.0 have a business logic vulnerability exists in the password reset mechanism of vikunja/api that allows password reset tokens to be reused indefinitely. Due to a failure to invalidate tokens upon use and a critical logic bug in the token cleanup cron job, reset tokens remain valid forever. This allows an attacker who intercepts a single reset token (via logs, browser history, or phishing) to perform a complete, persistent account takeover at any point in the future, bypassing standard authentication controls. Version 2.1.0 contains a patch for the issue.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/go-vikunja/vikunja","events":[{"introduced":"0"},{"fixed":"ec11643c24b0f00c55ec5a60328b54e2c3a69962"},{"fixed":"5c2195f9fca9ad208477e865e6009c37889f87b2"}],"database_specific":{"cpe":"cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"2.1.0"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v2.0.0","v1.1.0","v1.0.0","v1.0.0-rc4","v1.0.0-rc3","v1.0.0-rc2","v1.0.0-rc1","v1.0.0-rc0","v0.24.1","v0.23.0","v0.22.1","v0.22.0","v0.21.0","v0.20.4","v0.20.3","v0.20.1","v0.20.0","v0.19.2","v0.19.1","v0.19.0","v0.18.1","v0.18.0","v0.17.0","v0.16.0","v0.15.0","v0.14.0","v0.13","v0.12","v0.11","v0.10","v0.9","v0.8","v0.7","v0.6","v0.5","v0.4","v0.3","v0.2","v0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28268.json"}}],"references":[{"type":"WEB","url":"https://vikunja.io/changelog/vikunja-v2.1.0-was-released"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28268.json"},{"type":"ADVISORY","url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-rfjg-6m84-crj2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-28268"},{"type":"FIX","url":"https://github.com/go-vikunja/vikunja/commit/5c2195f9fca9ad208477e865e6009c37889f87b2"}],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-459","CWE-640"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28268.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}