---
id: CVE-2026-45644
title: Microsoft Live Share Canvas SDK Elevation of Privilege Vulnerability
summary: >-
  Improper neutralization of input during web page generation ('cross-site
  scripting') in Microsoft Live Share Canvas SDK allows an authorized attacker
  to elevate privileges over a network.
severity: high
cvss: 8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-79
vendor: Microsoft
product: Microsoft Live Share Canvas SDK
affected:
  - live_share_canvas_sdk >= 1.0.0 < 1.4.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-06-10T13:42:41.226873Z'
published: '2026-06-09'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T13:44:34.865Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-45644'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45644'
    label: Microsoft Live Share Canvas SDK Elevation of Privilege Vulnerability
tags:
  - cve.org
epss: 0.00554
epssPercentile: 0.45109
ingestedAt: '2026-09-24T14:44:21.391Z'
---

## Overview

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Live Share Canvas SDK allows an authorized attacker to elevate privileges over a network.

## Affected

- `live_share_canvas_sdk >= 1.0.0 < 1.4.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.