CVE-2026-43887

HIGH EPSS 15.6%

Published May 11, 20261mo ago · Modified Jun 17, 20261w ago

7.3 CVSS 3.1

High

Published May 11, 2026 1mo ago

Last Modified Jun 17, 2026 1w ago

Description

Outline is a service that allows for collaborative documentation. From 0.84.0 to 1.6.1, the Outline comment section permits users to mention other users; however, the backend does not validate or sanitize the href attribute associated with these mentions. As a result, potentially dangerous protocols (e.g., javascript:) are not filtered, introducing a risk of client-side code execution. This vulnerability is fixed in 1.7.0.

CVSS Details

Base Score

7.3

Exploitability

2.1

Impact

5.2

Vector string

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

Attack Vector Network

Attack Complexity Low

Privileges Required Low

User Interaction Required

Scope Unchanged

Confidentiality High

Integrity High

Availability None

Threat Intelligence

EPSS Exploit Probability

15.6% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

References 1

github.com https://github.com/outline/outline/security/advisories/GHSA-rqrg-f3qc-xvgh

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.