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TI-2026-33388 Aliases CVE-2026-45644GHSA-pc2q-pf7r-rf2w

Microsoft Live Share Canvas SDK Elevation of Privilege Vulnerability

Priority LOW 38CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00554 46th percentileScored 2026-11-07
Fix Fixed Microsoft Live Share Canvas SDK (Microsoft): 1.4.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Live Share Canvas SDK1.0.0 to before 1.4.21.4.2Patch availableCNA
  • Microsoft Live Share Canvas SDK VendorMicrosoft Affected 1.0.0 to before 1.4.2 Fixed in 1.4.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:live_share_canvas:*:*:*:*:*:node.js:*:*before 1.4.2VulnerableMicrosoft
  • cpe:2.3:a:microsoft:live_share_canvas:*:*:*:*:*:node.js:*:* Versions before 1.4.2 Vulnerable ·Microsoft

Remediation

  • Fix · CNA Microsoft Live Share Canvas SDK (Microsoft) Fixed in 1.4.2

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Elevation of Privilege
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
Microsoft Live Share Canvas SDKFixed 1.4.2 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-45644
  2. 2026-10-03 Alias added: GHSA-pc2q-pf7r-rf2w
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Patch 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences