CVE-2026-28268

CRITICAL EPSS 47.5%
Published Feb 27, 20264mo ago · Modified Mar 6, 20263mo ago
9.8 CVSS 3.1
Critical
Find Similar
Published Feb 27, 2026 4mo ago
Last Modified Mar 6, 2026 3mo ago

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
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

Threat Intelligence

EPSS Exploit Probability
47.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 2

CWE-459
CWE-640

Affected Products 1

VendorProductVersionRange
vikunjavikunja* <2.1.0

References 3

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

Remediation

  • github.com https://github.com/go-vikunja/vikunja/commit/5c2195f9fca9ad208477e865e6009c37889f87b2
    Patch