CVE-2026-10032

Tuesday, August 04, 2026

6.1

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U

Summary

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.

Affected Software

Vendor	Product	Version Range	Status
Google	@a2ui/web_core	`0.9.0`	affected
Google	@a2ui/web_core	`0.9.1-alpha.0`	affected
Google	@a2ui/web_core	`0.9.1-alpha.1`	affected
Google	@a2ui/web_core	`0.9.1-alpha.2`	affected
Google	@a2ui/web_core	`0.9.1-alpha.3`	affected
Google	@a2ui/web_core	`0.9.1-alpha.4`	affected
Google	@a2ui/web_core	`0.9.1-alpha.5`	affected
Google	@a2ui/web_core	`0.9.1`	affected
Google	@a2ui/web_core	`0.9.2`	affected
Google	@a2ui/web_core	`0.10.0`	affected
Google	@a2ui/web_core	`0.10.1`	affected

Weaknesses

CWE-79: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

ADP Enrichment

CISA ADP Vulnrichment

SSVC:
Exploitation: none
- Automatable: no
- Technical Impact: total

References

https://github.com/a2ui-project/a2ui/security/advisories/GHSA-72qq-p3r5-f7wq

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