CVE-2026-45644: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Microsoft Microsoft Live Share Canvas SDK
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.
AI Analysis
Technical Summary
This vulnerability (CWE-79) in Microsoft Live Share Canvas SDK 1.0.0 allows an authorized attacker to perform cross-site scripting due to improper input neutralization during web page generation. Exploitation can lead to privilege escalation over the network. The CVSS 3.1 base score is 8.0, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this issue.
Potential Impact
Successful exploitation can result in high impact on confidentiality, integrity, and availability by allowing an authorized attacker to execute arbitrary scripts in the context of the affected application, potentially leading to privilege escalation and further network compromise.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the vendor-provided patch as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45644 to remediate this vulnerability.
CVE-2026-45644: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Microsoft Microsoft Live Share Canvas SDK
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.
CVSS v3.1
Score 8.0high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-79) in Microsoft Live Share Canvas SDK 1.0.0 allows an authorized attacker to perform cross-site scripting due to improper input neutralization during web page generation. Exploitation can lead to privilege escalation over the network. The CVSS 3.1 base score is 8.0, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this issue.
Potential Impact
Successful exploitation can result in high impact on confidentiality, integrity, and availability by allowing an authorized attacker to execute arbitrary scripts in the context of the affected application, potentially leading to privilege escalation and further network compromise.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the vendor-provided patch as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45644 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-12T20:33:35.156Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45644","vendor":"Microsoft"}]
Threat ID: 6a284ce98dd33fbd85664ee9
Added to database: 6/9/2026, 5:27:05 PM
Last enriched: 6/9/2026, 6:40:42 PM
Last updated: 6/10/2026, 6:27:17 AM
Views: 5
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