---
id: "CVE-2026-123519"
page: "https://infrastack.ai/live/CVE-2026-123519"
kind: "vulnerability"
aliases: ["CVE-2026-123519"]
title: "Vikunja: unlimited WeKan import lets logged-in users exhaust memory"
severity: "high"
cvss: 7.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "self-hosted", "vikunja"]
not_affected_if: ["version-2.7.1-or-later"]
published_at: "2026-11-08T02:16:41+00:00"
first_seen_at: "2026-11-08T02:21:09+00:00"
updated_at: "2026-11-08T02:23:29+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123519", "first_seen_at": "2026-11-08T02:21:09+00:00"}]
exploit_sources: []
---

# Vikunja: unlimited WeKan import lets logged-in users exhaust memory

Link for people: https://infrastack.ai/live/CVE-2026-123519 (this .md is for agents)

Vikunja before 2.7.1 does not cap the number of items in WeKan or vikunja-file imports. An authenticated user can upload a large WeKan JSON file to the migration endpoint, exhausting server memory and crashing the instance.

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

## How to check

- Check the running Vikunja version against the `2.7.1` boundary.
- Confirm whether the WeKan or vikunja-file migration endpoints are reachable by user accounts.

## Fix

- Vikunja: move to `2.7.1` or later.

## Timeline

- 2026-11-08T02:21:09+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123519

## Documents

- [advisory] Vendor advisory: github.com https://github.com/go-vikunja/vikunja/security/advisories/GHSA-g2xc-jv9q-46wq
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/vikunja-before-2.7.1-memory-exhaustion-dos-via-wekan-and-vikunja-file-imports

## From the sources

Vikunja before 2.7.1 contains a denial of service vulnerability that allows authenticated users to exhaust API process memory by uploading WeKan or vikunja-file imports with no item-count cap. Attackers can submit a ~22 MB WeKan JSON with hundreds of thousands of cards or duplicate IDs to the wekan migrate endpoint, triggering OOM and crashing the instance.

---

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