CVE-2026-28268CRITICAL 9.8EPSS p47.3%

CVE-2026-28268CVE-2026-28268

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.67% probability of exploitation · percentile 47.3% · 2026-06-19T12:03:05Z
Published2026-02-27
Last modified2026-03-06

Underlying weaknesses· 2

CWE-459CWE-640

References

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

2

TypeTargetConfidenceTier
WeaknessIncomplete Cleanupcwe-4590%live
WeaknessWeak Password Recovery Mechanism for Forgotten Passwordcwe-6400%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.