CVE-2026-120489

Description

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.

References

• https://github.com/outline/outline/blob/v1.11.0/server/commands/documentCreator.ts#L135-L143
• https://github.com/outline/outline/commit/d249b34e8e5fd465d542cad87190d411fdcbd5dc
• https://github.com/outline/outline/releases/tag/v1.12.0
• https://github.com/outline/outline/security/advisories/GHSA-h6ff-rw9x-5mq2
• https://www.vulncheck.com/advisories/outline-before-1.12.0-incorrect-authorization-via-authorizedocumentpublish-detached-draft