# CVE-2026-28268

## Summary

- **CVE ID:** CVE-2026-28268
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-459, CWE-640
- **Published:** Feb 27, 2026
- **Last Modified:** Mar 12, 2026

## Description

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 Products

- go-vikunja — vikunja (< 2.1.0)

## References

- [CNA](https://github.com/go-vikunja/vikunja/security/advisories/GHSA-rfjg-6m84-crj2)
- [CNA](https://github.com/go-vikunja/vikunja/commit/5c2195f9fca9ad208477e865e6009c37889f87b2)
- [CNA](https://vikunja.io/changelog/vikunja-v2.1.0-was-released)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.67%
- **EPSS Percentile:** 50.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._