Auth bypass in Getoutline Outline
CVE-2026-41649
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (33.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Getoutline Outline
- Outline — versions >= 0.86.0, < 1.7.0
Weakness classification (CWE)
References
- github.com/outline/outline/security/advisories/GHSA-23jj-rp48-w7q7 (Exploit, Vendor Advisory)
- github.com/outline/outline/commit/1b91a295e10f58a1088c54f533773788325ff460 (Patch)
- github.com/outline/outline/releases/tag/v1.7.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-41649?
- CVE-2026-41649 is a high-severity vulnerability in Getoutline Outline, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.7/10. Published 2026-04-28.
- How severe is CVE-2026-41649?
- High severity. CVSS v3 base score is 7.7 out of 10.