CVE-2026-45644: Microsoft Live Share Canvas

High severity, CVSS 8.0. EPSS: 0.8% chance of exploitation in the next 30 days.

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 products

• Microsoft Live Share Canvas: before 1.4.2 (fixed in 1.4.2)

Published 2026-06-09. Last modified 2026-07-23.