---
id: "CVE-2026-123531"
page: "https://infrastack.ai/live/CVE-2026-123531"
kind: "vulnerability"
aliases: ["CVE-2026-123531"]
title: "Vikunja: page=0 bypasses item limit, letting users exhaust server resources"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "self-hosted", "vikunja"]
not_affected_if: ["2.7.1-or-later", "auth-required", "managed-hosting"]
published_at: "2026-11-08T02:16:43+00:00"
first_seen_at: "2026-11-08T02:21:09+00:00"
updated_at: "2026-11-08T02:22:42+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123531", "first_seen_at": "2026-11-08T02:21:09+00:00"}]
exploit_sources: []
---

# Vikunja: page=0 bypasses item limit, letting users exhaust server resources

Link for people: https://infrastack.ai/live/CVE-2026-123531 (this .md is for agents)

Vikunja, a self-hosted task manager, lets any logged-in user skip its per-page item limit by sending page=0 to its list API endpoints. Repeated requests force huge database queries and memory use, slowing the service down for other users.

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

## How to check

- Check the Vikunja version with `vikunja version` or the About page; affected releases are from `1.0.0` before `2.7.1`.
- Check whether open self-registration is enabled in the Vikunja config (`service.enableregistration`).

## Fix

- Upgrade Vikunja to `2.7.1` or later.

## Timeline

- 2026-11-08T02:21:09+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123531

## Documents

- [advisory] Vendor advisory: github.com https://github.com/go-vikunja/vikunja/security/advisories/GHSA-v579-5fwc-gr28
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/vikunja-1.0.0-before-2.7.1-pagination-limit-bypass-via-page-0-parameter

## From the sources

Vikunja from 1.0.0 before 2.7.1 contains an uncontrolled resource consumption vulnerability that allows authenticated users to bypass service.maxitemsperpage by sending page=0 to /api/v1 list endpoints. Attackers can self-register and repeatedly request page=0 to force unbounded SQL queries, memory materialisation, and per-row query fan-out, degrading availability for other users.

---

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