CVE-2026-10032Arbitrary JavaScript Execution via openUrl in @a2ui/web_core
Updated under an hour ago ()
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It affects Google @a2ui/web_core and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.1 MEDIUM (v4.0, CNA)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
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- NVD analysis
- Analyzed
- Record last updated
- Aug 4, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Google @a2ui/web_core google:a2ui_web_core (from the name) | 0.9.0; 0.9.1-alpha.0; 0.9.1-alpha.1; 0.9.1-alpha.2; 0.9.1-alpha.3; 0.9.1-alpha.4; 0.9.1-alpha.5; 0.9.1; and 3 more ranges | CNA record |
google a2ui/web_core google:a2ui/web_core | from 0.9.0 before 0.10.2 | NVD |
References
- https://github.com/a2ui-project/a2ui/security/advisories/GHSA-72qq-p3r5-f7wqvendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.