CVE-2026-27937 PUBLISHED

October: Reflected XSS via DataTable Form Widget

Assigner: GitHub_M
Reserved: 25.02.2026 Published: 21.04.2026 Updated: 21.04.2026

October is a Content Management System (CMS) and web platform. Prior to 3.7.16 and 4.1.16, a reflected Cross-Site Scripting (XSS) vulnerability was identified in the backend DataTable widget where a query parameter was rendered without proper output escaping. This vulnerability is fixed in 3.7.16 and 4.1.16.

Metrics

CVSS 3.1

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

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	Low
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	octobercms
Product	october
Versions	Version >= 4.0.0, < 4.1.16 is affected Version < 3.7.16 is affected

References

https://github.com/octobercms/october/security/advisories/GHSA-jj38-h5w5-mvpf

Problem Types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE