by Kastro
Paper/Archive/CVE-2026-28268

CVE-2026-28268

go-vikunja vikunja — Vikunja Vulnerable to Account Takeover via Password Reset Token Reuse

EPSS 0.7%CVSS 9.8
critical.is priorityof 100
40
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 54.9.549 × 2011.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
vikunja< 2.1.0–CNA

Scores by source

GitHub_M (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/go-vikunja/vikunja/security/advisories/GHSA-rfjg-6m84-crj2refgithub.com/go-vikunja/vikunja/commit/5c2195f9fca9ad208477e865e6009c37889f87b2refvikunja.io/changelog/vikunja-v2.1.0-was-released