---
id: "CVE-2026-120489"
kind: "vulnerability"
aliases: ["CVE-2026-120489"]
title: "Outline: authenticated members can publish documents into private collections"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["outline", "package", "self-hosted", "wiki"]
not_affected_if: ["already-on-1.12.0-or-later", "no-untrusted-members"]
published_at: "2026-11-02T15:17:30+00:00"
first_seen_at: "2026-11-02T15:24:04+00:00"
updated_at: "2026-11-02T15:26:26+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-120489", "first_seen_at": "2026-11-02T15:24:04+00:00"}]
---

# Outline: authenticated members can publish documents into private collections

Outline versions before 1.12.0 let a logged-in member publish documents into private collections they cannot write to. An attacker can use this to place phishing content inside a private collection.

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

## How to check

- Check the installed Outline version (for example in the deployment's package or image tag) and compare it with `1.12.0`.
- Confirm whether the instance allows members to create or publish documents at all.

## Fix

- Move Outline to `1.12.0` or later.

## Timeline

- 2026-11-02T15:24:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-120489

## Documents

- [advisory] Vendor advisory: github.com https://github.com/outline/outline/security/advisories/GHSA-h6ff-rw9x-5mq2
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/outline-before-1.12.0-incorrect-authorization-via-authorizedocumentpublish-detached-draft
- [fix] Patch: github.com https://github.com/outline/outline/commit/d249b34e8e5fd465d542cad87190d411fdcbd5dc
- [fix] Release notes: github.com https://github.com/outline/outline/releases/tag/v1.12.0

## From the sources

Outline before 1.12.0 contains an incorrect authorization vulnerability in authorizeDocumentPublish() that allows authenticated members to publish documents into private collections without write access. Attackers can detach a child document via documents.unpublish, retaining parentDocumentId, then call documents.update with a private collection UUID to inject phishing content.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_