critical9.3
CVE-2026-10032
The openUrl function in @a2ui/web_core passes an agent-controlled URL directly to window.open() without validating the URI scheme.
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @a2ui/web_core | >= 0.9.0, < 0.10.2 | 0.10.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| A2ui\/Web Core | from 0.9.0 before 0.10.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-72qq-p3r5-f7wq
- https://github.com/a2ui-project/a2ui/security/advisories/GHSA-72qq-p3r5-f7wq
- https://nvd.nist.gov/vuln/detail/CVE-2026-10032
- https://github.com/a2ui-project/a2ui/pull/1707
- https://github.com/a2ui-project/a2ui/commit/71573078c4168b2dc166bb847c3a85715dadc675