---
id: "CVE-2026-123494"
page: "https://infrastack.ai/live/CVE-2026-123494"
kind: "vulnerability"
aliases: ["CVE-2026-123494"]
title: "Vikunja: missing OAuth state check lets attackers import data into victim accounts"
severity: "medium"
cvss: 5.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "self-hosted", "todo-apps", "vikunja"]
not_affected_if: ["migration-unused", "version-2.7.1-or-later"]
published_at: "2026-11-08T02:16:36+00:00"
first_seen_at: "2026-11-08T02:21:07+00:00"
updated_at: "2026-11-08T02:25:29+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123494", "first_seen_at": "2026-11-08T02:21:07+00:00"}]
exploit_sources: []
---

# Vikunja: missing OAuth state check lets attackers import data into victim accounts

Link for people: https://infrastack.ai/live/CVE-2026-123494 (this .md is for agents)

Vikunja's Todoist, Microsoft To Do and Trello migration OAuth callbacks do not bind a state parameter, so a logged-in user can be tricked into visiting a callback that imports attacker-chosen projects and tasks. The imported tasks can carry phishing links.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the Vikunja version in use; the sources say versions before `2.7.1` are affected.
- Check whether the Todoist, Microsoft To Do or Trello migration feature is reachable on your instance.

## Fix

- Vikunja: move to `2.7.1` or later.

## Timeline

- 2026-11-08T02:21:07+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123494

## Documents

- [advisory] Vendor advisory: github.com https://github.com/go-vikunja/vikunja/security/advisories/GHSA-xgw3-ccqg-f6ww
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/vikunja-before-2.7.1-login-csrf-via-migration-oauth-callbacks

## From the sources

Vikunja before 2.7.1 contains a cross-site request forgery vulnerability that allows attackers to import their data into a victim's account because the Todoist, Microsoft To Do, and Trello migration OAuth callbacks lack a bound state parameter. Attackers can authorize their own account, keep the unused callback code or token, and lure a logged-in victim to the migration callback route to auto-import attacker-chosen projects and tasks containing phishing links.

---

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