What is CVE-2026-47639?

CVE-2026-47639 is a medium-severity vulnerability in Microsoft Sharepoint_server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-06-09.

How severe is CVE-2026-47639?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Microsoft Sharepoint_server

CVE-2026-47639

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Microsoft Sharepoint_server — versions 2016, 2019

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

secure@microsoft.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-47639?: CVE-2026-47639 is a medium-severity vulnerability in Microsoft Sharepoint_server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-06-09.
How severe is CVE-2026-47639?: Medium severity. CVSS v3 base score is 5.4 out of 10.