---
title: "CVE-2026-28268: Vikunja Vulnerable to Account Takeover via Password Reset Token Reuse"
url: https://erroneo.us/security/cve/CVE-2026-28268/
description: "CVE-2026-28268 (code.vikunja.io/api (Go)): Vikunja is an open-source self-hosted task management platform. Versions prior to 2.1.0 have a business logic…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-02-27
date_modified: 2026-03-03
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-28268"
kev: false
cvss: 9.8
epss: 0.00914
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-28268: Vikunja Vulnerable to Account Takeover via Password Reset Token Reuse

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.9% , percentile 60: FIRST’s model estimates a 0.9% chance of exploitation activity in the next 30 days, higher than 60% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes code.vikunja.io/api (Go) <= 0.24.6, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

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 packages

- Go `code.vikunja.io/api` <= 0.24.6 → fixed: none listed

## Affected products (CVE record)

- go-vikunja vikunja: < 2.1.0

## Severity

- GitHub_M CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.91% probability of exploitation activity in the next 30 days; percentile 60.

## Sources

- [GitHub Advisory GHSA-rfjg-6m84-crj2](https://github.com/advisories/GHSA-rfjg-6m84-crj2)
- [CVE.org record CVE-2026-28268](https://www.cve.org/CVERecord?id=CVE-2026-28268)
- [NVD entry CVE-2026-28268](https://nvd.nist.gov/vuln/detail/CVE-2026-28268)
- [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)

---
Source page: https://erroneo.us/security/cve/CVE-2026-28268/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt