CVE-2026-28268

CRITICAL 9.8

Vikunja Vulnerable to Account Takeover via Password Reset Token Reuse

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-459 CWE-640
Vendor	go-vikunja
Product	vikunja
Published	Feb 27, 2026
Last Updated	Mar 3, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

go-vikunja / vikunja

< 2.1.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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