CVE-2026-43887

7.3 highEPSS 0.2%

High (7.3). EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.3 high

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

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 15% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-05-11
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

References

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

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