What’s Vulnerable › Vulnerabilities

CVE-2026-45644: Microsoft Live Share Canvas SDK Elevation of Privilege Vulnerability

• Severity: high (CVSS 8.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-09 · updated 2026-09-24
• Weakness: CWE-79

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.

Affected products

• Microsoft Live Share Canvas SDK: before 1.4.2 — fixed in 1.4.2
• Microsoft Live Share Canvas SDK: from 1.0.0 before 1.4.2 — fixed in 1.4.2

How to fix

Upgrade to a fixed version: Microsoft Live Share Canvas SDK 1.4.2; Microsoft Live Share Canvas SDK 1.4.2. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45644

Get alerted when CVE-2026-45644 or the next vulnerability affects your stack