---
id: GHSA-c2g7-39fr-cp8q
title: >-
  Duplicate Advisory: Vikunja: Planka migration retains an unbounded aggregate
  of attacker-served attachments and can OOM the API
summary: >-
  Duplicate Advisory: Vikunja: Planka migration retains an unbounded aggregate
  of attacker-served attachments and can OOM the API
severity: high
cvss: 6.5
cwe:
  - CWE-770
vendor: api
product: code.vikunja.io/api
ecosystem: go
affected:
  - 'code.vikunja.io/api >= 2.5.0, < 2.6.0'
published: '2026-09-15'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T20:53:18Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-c2g7-39fr-cp8q'
references:
  - url: >-
      https://github.com/go-vikunja/vikunja/security/advisories/GHSA-wq92-8x3r-fm38
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91970'
  - url: >-
      https://www.vulncheck.com/advisories/vikunja-before-2.6.0-resource-exhaustion-via-planka-migration
  - url: 'https://github.com/advisories/GHSA-c2g7-39fr-cp8q'
tags:
  - ghsa
  - go
ingestedAt: '2026-10-09T21:12:42.326Z'
---

## Overview

### Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-wq92-8x3r-fm38. This link is maintained to preserve external references.

### Original Description
Vikunja versions before 2.6.0 contain a resource exhaustion vulnerability in the Planka migrator that fails to enforce aggregate memory budgets during migration jobs. Authenticated attackers can submit migration requests pointing to attacker-controlled servers advertising numerous size-compliant attachments, exhausting worker memory and causing denial of service for all users.

## Affected packages

- `code.vikunja.io/api >= 2.5.0, < 2.6.0`

## Remediation

Refer to the advisory for the patched release.