---
id: "CVE-2026-110065"
page: "https://infrastack.ai/live/CVE-2026-110065"
kind: "vulnerability"
aliases: ["CVE-2026-110065"]
title: "Microsoft SharePoint Server Subscription Edition: cross-site scripting lets a signed-in user spoof content"
severity: "high"
cvss: 7.3
epss: null
exploited: false
status: "open"
category: "vendor"
products: [{"name": "Microsoft SharePoint Server Subscription Edition", "fixed": ["16.0.20326.20278"], "affected": ">= 16.0.0, < 16.0.20326.20278", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["microsoft", "microsoft-office", "on-premises", "sharepoint", "spoofing", "vendor", "xss"]
not_affected_if: ["auth-required", "sharepoint-online"]
published_at: "2026-11-10T19:18:24+00:00"
first_seen_at: "2026-11-10T19:24:27+00:00"
updated_at: "2026-11-11T00:33:12+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-110065", "first_seen_at": "2026-11-10T19:24:27+00:00"}, {"source": "analyst", "url": "https://app.opencve.io/cve/CVE-2026-110065", "first_seen_at": "2026-11-11T00:33:12+00:00", "cites": ["https://app.opencve.io/cve/CVE-2026-110065", "https://blog.stefan-gossner.com/2026/11/10/sharepoint-security-fixes-released-with-november-2026-pu-and-offered-through-microsoft-update/"]}]
exploit_sources: []
---

# Microsoft SharePoint Server Subscription Edition: cross-site scripting lets a signed-in user spoof content

Link for people: https://infrastack.ai/live/CVE-2026-110065 (this .md is for agents)

Microsoft's CNA record (CVSS 3.1 7.3 High, AV:N/PR:L/UI:R) describes improper neutralization of input in generated pages (CWE-79) in SharePoint, letting an authorized attacker spoof content over the network. Not reported exploited; not in CISA KEV. Fixed in the November 2026 security update.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Microsoft SharePoint Server Subscription Edition affected >= 16.0.0, < 16.0.20326.20278 fixed 16.0.20326.20278

## How to check

On SharePoint Server Subscription Edition, check the farm build (Central Administration > Upgrade and Migration > Check product and patch installation status, or Get-SPFarm).BuildVersion). Builds from 16.0.0 below 16.0.20326.20278 are affected.

## Fix

Install the November 2026 security update KB 5002945 for SharePoint Server Subscription Edition (build 16.0.20326.20278 or later). If the farm is on September 2025 CU, run the folder-permission fix script first or the install fails (per Stefan Goßner).

## Timeline

- 2026-11-10T19:24:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-110065
- 2026-11-11T00:33:12+00:00 analyst https://app.opencve.io/cve/CVE-2026-110065 — Versions/fix come from Microsoft's CNA record via NVD/OpenCVE mirrors and Goßner's patch-day post; MSRC page not readable (empty), so nothing marked verified. Triage product 'Office SharePoint' narrowed to SE; Server 2016/2019 not listed in the CNA data. Whether KB5002945 lists this CVE is unconfirmed by primary page.

## Documents

- [describes] OpenCVE CVE-2026-110065 (CNA data) https://app.opencve.io/cve/CVE-2026-110065
- [fix] SharePoint security fixes released with November 2026 PU https://blog.stefan-gossner.com/2026/11/10/sharepoint-security-fixes-released-with-november-2026-pu-and-offered-through-microsoft-update/

## From the sources

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.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_