CVE-2026-41649

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.

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CVSS v3.1 Score

7.7

HIGH

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

EPSS — Exploit Prediction

0.0003

Probability of exploitation

0.09%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-639 CWE-639

Affected Products

Vendor	Product	Versions
getoutline	outline	0.86.0 — 1.7.0

References

Advisories & Patches

https://github.com/outline/outline/commit/1b91a295e10f58a1088c54f533773788325ff460 https://github.com/outline/outline/security/advisories/GHSA-23jj-rp48-w7q7 https://github.com/outline/outline/security/advisories/GHSA-23jj-rp48-w7q7

Exploits

https://github.com/outline/outline/security/advisories/GHSA-23jj-rp48-w7q7 https://github.com/outline/outline/security/advisories/GHSA-23jj-rp48-w7q7

Other References

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

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 7.7 (HIGH).

How severe is CVE-2026-41649? +

CVE-2026-41649 has a CVSS v3.1 score of 7.7 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0003, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-41649? +

CVE-2026-41649 affects products from getoutline, specifically: outline. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-41649? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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