CVE-2026-45644
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Cross-Site Scripting in Microsoft Live Share Canvas SDK

Publication date: 2026-06-09

Last updated on: 2026-06-19

Assigner: Microsoft Corporation

Description
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.

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Meta Information

Published
2026-06-09
Last Modified
2026-06-19
Generated
2026-06-30
AI Q&A
2026-06-09
EPSS Evaluated
2026-06-28
NVD
CVE-2026-45644
EUVD
EUVD-2026-35568

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft live_share_canvas to 1.4.2 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This vulnerability is a type of cross-site scripting (XSS) caused by improper neutralization of input during web page generation in the Microsoft Live Share Canvas SDK.

It allows an authorized attacker to execute malicious scripts by injecting harmful input that is not properly sanitized.

As a result, the attacker can elevate their privileges over a network.

Impact Analysis

This vulnerability can lead to an elevation of privilege, meaning an attacker with some level of authorization can gain higher access rights than intended.

Such an elevation can compromise the confidentiality, integrity, and availability of data and systems, potentially allowing the attacker to perform unauthorized actions.

Mitigation Strategies

The vulnerability involves improper neutralization of input during web page generation in Microsoft Live Share Canvas SDK, which allows an authorized attacker to elevate privileges over a network.

To mitigate this vulnerability, it is recommended to apply any security updates or patches provided by Microsoft for the Live Share Canvas SDK as soon as they become available.

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