---
id: GHSA-m4vj-wr5q-cmvr
title: >-
  Duplicate Advisory: Vikunja: Every /api/v2 pre-auth endpoint is unthrottled on
  a stock install while its /api/v1 twin is rate limited
summary: >-
  Duplicate Advisory: Vikunja: Every /api/v2 pre-auth endpoint is unthrottled on
  a stock install while its /api/v1 twin is rate limited
severity: high
cvss: 7.5
cwe:
  - CWE-307
vendor: go-vikunja
product: github.com/go-vikunja/vikunja
ecosystem: go
affected:
  - github.com/go-vikunja/vikunja <= 2.5.0
published: '2026-09-15'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T20:51:00Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-m4vj-wr5q-cmvr'
references:
  - url: >-
      https://github.com/go-vikunja/vikunja/security/advisories/GHSA-6rvj-qwjf-3m4q
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91972'
  - url: >-
      https://www.vulncheck.com/advisories/vikunja-before-2.6.0-authentication-bypass-via-unthrottled-api
  - url: 'https://github.com/advisories/GHSA-m4vj-wr5q-cmvr'
tags:
  - ghsa
  - go
ingestedAt: '2026-10-09T21:12:42.332Z'
---

## Overview

### Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-6rvj-qwjf-3m4q. This link is maintained to preserve external references.

### Original Description
Vikunja versions before 2.6.0 fail to apply rate limiting to /api/v2 public authentication endpoints including login, register, password-reset, and OAuth token routes. Remote unauthenticated attackers can perform unbounded credential guessing, account enumeration, and password-reset flooding attacks without throttling restrictions.

## Affected packages

- `github.com/go-vikunja/vikunja <= 2.5.0`

## Remediation

Refer to the advisory for the patched release.