CVE-2026-10032

high

Description

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.

References

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

https://github.com/a2ui-project/a2ui/pull/1707

https://github.com/a2ui-project/a2ui/commit/71573078c4168b2dc166bb847c3a85715dadc675

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-52744

Details

Source: Mitre, NVD

Published: 2026-08-04

Updated: 2026-09-23

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.1

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Severity: Medium

CVSS v4

Base Score: 8.6

Vector: 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

Severity: High

EPSS

EPSS: 0.00125