CVE-2026-45644

highCVSS 8covered by 1 sourcefirst seen 2026-06-09

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.

CSIRTS triage

What: This vulnerability allows an authorized attacker to elevate privileges over a network.
Who is affected: Users of Microsoft Live Share Canvas SDK are affected.
Urgency: Remediation is urgent due to the high severity of the vulnerability.
Action: Apply the latest security updates from Microsoft.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Low exploitation risk0.55% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all EPSS-scored CVEs.

Advisory coverage (1)

highCVE-2026-45644: Microsoft Live Share Canvas SDK Elevation of Privilege Vulnerabilitymsrc · 2026-06-09

External references

NVD record for CVE-2026-45644

CVE.org record

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