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.

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History

Tue, 12 May 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 12 May 2026 09:15:00 +0000

Type Values Removed Values Added
First Time appeared Getoutline
Getoutline outline
Vendors & Products Getoutline
Getoutline outline

Mon, 11 May 2026 22:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Outline: Unauthorized Document Publication via Mixed collectionId+documentId Share
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-12T13:38:04.105Z

Reserved: 2026-05-04T15:17:09.330Z

Link: CVE-2026-43889

cve-icon Vulnrichment

Updated: 2026-05-12T13:37:53.750Z

cve-icon NVD

Status : Deferred

Published: 2026-05-11T22:22:13.760

Modified: 2026-05-12T14:50:18.527

Link: CVE-2026-43889

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-12T09:00:06Z

Weaknesses