CVE-2026-28268
Vikunja Vulnerable to Account Takeover via Password Reset Token Reuse
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.
INFO
Published Date :
Feb. 27, 2026, 9:16 p.m.
Last Modified :
March 6, 2026, 9:03 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update Vikunja to version 2.1.0 or later.
- Verify password reset token invalidation logic.
- Monitor for unauthorized access attempts.
Public PoC/Exploit Available at Github
CVE-2026-28268 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-28268.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-28268 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-28268
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Proof-of-concept exploits and reproduction labs for CVEs analyzed by the Exploit Intelligence Platform
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Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-28268 vulnerability anywhere in the article.
-
Daily CyberSecurity
Critical Flaws in Vikunja Expose Users to Persistent Account Takeovers
Vikunja is a popular open-source, self-hostable to-do application designed to help users organize their tasks using list, Kanban, Gantt, and table views while keeping their data entirely under their o ... Read more
The following table lists the changes that have been made to the
CVE-2026-28268 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Mar. 06, 2026
Action Type Old Value New Value Added CWE CWE-640 Added CPE Configuration OR *cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:* versions up to (excluding) 2.1.0 Added Reference Type GitHub, Inc.: https://github.com/go-vikunja/vikunja/commit/5c2195f9fca9ad208477e865e6009c37889f87b2 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/go-vikunja/vikunja/security/advisories/GHSA-rfjg-6m84-crj2 Types: Vendor Advisory Added Reference Type GitHub, Inc.: https://vikunja.io/changelog/vikunja-v2.1.0-was-released Types: Release Notes -
New CVE Received by [email protected]
Feb. 27, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-640 Added CWE CWE-459 Added Reference https://github.com/go-vikunja/vikunja/commit/5c2195f9fca9ad208477e865e6009c37889f87b2 Added Reference https://github.com/go-vikunja/vikunja/security/advisories/GHSA-rfjg-6m84-crj2 Added Reference https://vikunja.io/changelog/vikunja-v2.1.0-was-released