---
id: CVE-2026-62367
title: Vikunja is an open-source self-hosted task management platform
summary: >-
  Vikunja is an open-source self-hosted task management platform. In versions
  1.0.0 through 2.3.0, when an administrator enables the per-provider
  `emailfallback` option on an OpenID Connect provider, Vikunja links an SSO
  login to a pre-exi…
severity: high
cwe:
  - CWE-287
  - CWE-290
  - CWE-345
vendor: api
product: code.vikunja.io/api
affected:
  - 'code.vikunja.io/api >= 1.0.0, <= 2.3.0'
patched:
  - code.vikunja.io/api 2.4.0
published: '2026-10-09'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T21:17:05.470'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-62367'
references:
  - url: >-
      https://github.com/go-vikunja/vikunja/commit/7854f2729ab72000210b61c25929678fd6901630
    label: security-advisories@github.com
  - url: 'https://github.com/go-vikunja/vikunja/releases/tag/v2.4.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/go-vikunja/vikunja/security/advisories/GHSA-xv7q-fvmc-jx96
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-xv7q-fvmc-jx96'
tags:
  - nvd
  - ghsa
  - go
aliases:
  - GHSA-xv7q-fvmc-jx96
ecosystem: go
ingestedAt: '2026-10-09T21:12:42.333Z'
---

## Overview

Vikunja is an open-source self-hosted task management platform. In versions 1.0.0 through 2.3.0, when an administrator enables the per-provider `emailfallback` option on an OpenID Connect provider, Vikunja links an SSO login to a pre-existing local (username+password) account using only the `email` claim from the IdP. The fallback never checks an `email_verified` (or Microsoft `xms_edov`) signal and never requires the matched account's password. An attacker who can obtain a token from the configured issuer carrying a victim's email logs in as that victim with a full session, with no consent or interaction from the victim. Version 2.4.0 fixes the issue.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-62367)

Affected packages:

- `code.vikunja.io/api >= 1.0.0, <= 2.3.0`

Patched in:

- `code.vikunja.io/api 2.4.0`

Source: https://github.com/advisories/GHSA-xv7q-fvmc-jx96