CVE-2026-45644

FAUCET Score

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.

First published: Jun 9, 2026Last modified: Jun 9, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 1.4.2CPE matchmatch criteria	cpe:2.3:a:microsoft:live_share_canvas::::::node.js::*

CVSS Data

CVSS version used by this source: 3.1

8.0HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

Exploitability Score

2.1

Impact Score

5.9

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.55%

Probability of exploitation in next 30 days

EPSS Percentile

42.9%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0055 is in the 56th percentile among its peer group of 890 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

microsoftpatch availablevia msrc

Product: Microsoft Live Share Canvas SDKFixed in: 1.4.2

View patch

Vendor Advisories (1)

microsoft2026-Jun/CVE-2026-45644Important

Microsoft Live Share Canvas SDK Elevation of Privilege Vulnerability

Jun 9, 2026

References

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

Vendor Advisory