Critical 9.0

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft...

CVE-2026-109454 First seen on SecPulse 03:15

Affected packages

Ecosystem	Package	Affected → Fixed	Fixed
Microsoft	MicrosoftMicrosoft SharePoint Server Subscription Edition	≥ 16.0.0, < 16.0.20326.20278→ 16.0.20326.20278	16.0.20326.20278

Original description The description as published by the source.

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.

Source: CVE.org (CVE Program・cvelistV5) NVD GitHub Advisory

References

Key facts

CVSS v3: Critical 9.0; CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Published: Nov 11, 2026
First seen on SecPulse: 03:15
GHSA: GHSA-pp9j-q4j9-fhg6
CWE: CWE-79

NVD GitHub Advisory

Tags(click for explanation)

Attack Types

Cross-Site Scripting

CWE

CWE-79

Vendors

Microsoft

All

Microsoft Sharepoint Server Subscription Edition Msrc

Detection sources

NIST National Vulnerability Database06:18
GitHub Security Advisories (Global)06:32
Microsoft Security Response Center Blog03:20
CVE.org (CVE Program・cvelistV5)08:46