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Description

Outline is a service that allows for collaborative documentation. The `shares.create` API endpoint starting in version 0.86.0 and prior to version 1.7.0 has an insecure direct object reference.. When both `collectionId` and `documentId` are provided in the request, the authorization logic only checks access to the collection, completely ignoring the document. This allows an authenticated attacker to generate a valid public share link for any document on the platform, including documents belonging to other workspaces. The full document contents can then be retrieved via the `documents.info` endpoint. Version 1.7.0 contains a patch.

PUBLISHED Reserved 2026-04-21 | Published 2026-04-28 | Updated 2026-04-29 | Assigner GitHub_M




HIGH: 7.7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Problem types

CWE-639: Authorization Bypass Through User-Controlled Key

Product status

>= 0.86.0, < 1.7.0
affected

References

github.com/...utline/security/advisories/GHSA-23jj-rp48-w7q7 exploit

github.com/...utline/security/advisories/GHSA-23jj-rp48-w7q7

github.com/...ommit/1b91a295e10f58a1088c54f533773788325ff460

github.com/outline/outline/releases/tag/v1.7.0

cve.org (CVE-2026-41649)

nvd.nist.gov (CVE-2026-41649)

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