CVE-2026-43889 — Outline: Unauthorized Document Publication via Mixed collectionId+documentId Share
Outline is a service that allows for collaborative documentation. Prior to 1.7.0, the shares.create API accepts both collectionId and documentId simultaneously and, when publish…
Published: 2026-05-11 · CVSS: 6.5 · CVSS 3.1
Outline is a service that allows for collaborative documentation. Prior to 1.7.0, the shares.create API accepts both collectionId and documentId simultaneously and, when published=false, only verifies read access for each—skipping the "share" permission check. A subsequent shares.update authorizes publication using an OR policy (can share collection OR can share document), so an attacker who holds share permission on one unrelated collection can publish a share that exposes an arbitrary document they cannot legitimately share, making it publicly accessible to unauthenticated users. This vulnerability is fixed in 1.7.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7