---
id: "CVE-2026-123513"
page: "https://infrastack.ai/live/CVE-2026-123513"
kind: "vulnerability"
aliases: ["CVE-2026-123513"]
title: "Vikunja: stored auth tokens leak to attacker-chosen API URL"
severity: "high"
cvss: 7.6
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "self-hosted", "vikunja", "web-frontend"]
not_affected_if: ["fixed-version", "managed-hosting"]
published_at: "2026-11-08T02:16:40+00:00"
first_seen_at: "2026-11-08T02:21:08+00:00"
updated_at: "2026-11-08T02:23:22+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123513", "first_seen_at": "2026-11-08T02:21:08+00:00"}]
exploit_sources: []
---

# Vikunja: stored auth tokens leak to attacker-chosen API URL

Link for people: https://infrastack.ai/live/CVE-2026-123513 (this .md is for agents)

Vikunja before 2.7.1 keeps login tokens in browser storage when a user switches the frontend API URL, so the bearer token and desktop OAuth refresh token go to the attacker's server. An attacker who gets a user to change that URL can take over the account.

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

## How to check

- Check the installed Vikunja version and confirm it is `2.7.1` or later.
- Review whether users can be sent to a link that changes the frontend API URL.

## Fix

- Vikunja: move to `2.7.1` or later.

## Timeline

- 2026-11-08T02:21:08+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123513

## Documents

- [advisory] Vendor advisory: github.com https://github.com/go-vikunja/vikunja/security/advisories/GHSA-rj93-wmch-2crq
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/vikunja-before-2.7.1-auth-token-leak-via-api-url-change

## From the sources

Vikunja before 2.7.1 contains a credential exposure vulnerability that allows attackers to steal stored auth tokens by inducing users to switch the frontend API URL. Because checkAndSetApiUrl leaves origin-independent localStorage tokens in place, the bearer token and desktop OAuth refresh token are sent to the attacker's server, enabling account takeover.

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_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_