Vulnerability Details CVE-2026-10032
The openUrl function in @a2ui/web_core passes an agent-controlled URL directly to window.open() without validating the URI scheme. A malicious agent can supply a javascript: URI as the url argument of a Button component's functionCall action. When the user clicks the rendered button, arbitrary JavaScript executes in the victim application's browser origin, constituting a stored/reflected XSS with Critical severity. No non-default configuration is required; the Basic Catalog is enabled by default.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 2.2%
CVSS Severity
CVSS v3 Score 6.1
Products affected by CVE-2026-10032
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cpe:2.3:a:google:a2ui/web_core:0.10.0
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cpe:2.3:a:google:a2ui/web_core:0.10.1
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cpe:2.3:a:google:a2ui/web_core:0.9.0
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cpe:2.3:a:google:a2ui/web_core:0.9.1
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cpe:2.3:a:google:a2ui/web_core:0.9.2