CVE-2026-41649 Outline has IDOR in document share creation that allows unauthorized access to private documents across workspaces

High 7.7 Published 28 Apr 2026 Updated 29 Apr 2026

Authenticated attackers can generate public share links for private documents in other workspaces due to flawed authorization checks, exposing sensitive data.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-41649?

CVE-2026-41649 is a high-severity missing authorization vulnerability in outline, published on 28 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-639

Which versions are affected by CVE-2026-41649?

It affects 1 product.

Products include Getoutline Outline.

How do I fix CVE-2026-41649?

No fix has been published for CVE-2026-41649 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-41649 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41649 exists.

Sources

Also known as GHSA-23jj-rp48-w7q7.