CVE-2026-45644

HIGH

Microsoft Live Share Canvas SDK Elevation of Privilege Vulnerability

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Microsoft Live Share Canvas SDK Elevation of Privilege Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45644

Scores

CVSS v3 8.0
EPSS 0.0041
EPSS Percentile 32.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-79
Status published
Products (1)
Microsoft/Microsoft Live Share Canvas SDK 1.0.0 - 1.4.2
Published Jun 09, 2026
Tracked Since Jun 09, 2026