Arbitrary JavaScript Execution via openUrl in @a2ui/web_core

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-10032
StatePUBLISHED
AssignerGoogle
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-04 16:16:20 UTC
Updated2026-08-04 19:16:39 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v4.0 6.1 MEDIUM from [email protected]

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary6.1MEDIUMCVSS: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/C...
4.0CNACVSS6.1MEDIUMCVSS: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

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
Passive
Confidentiality
High
Integrity
High
Availability
Low
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Google @a2ui/web Core affected 0.9.0 Not specified
CNA Google @a2ui/web Core affected 0.9.1-alpha.0 Not specified
CNA Google @a2ui/web Core affected 0.9.1-alpha.1 Not specified
CNA Google @a2ui/web Core affected 0.9.1-alpha.2 Not specified
CNA Google @a2ui/web Core affected 0.9.1-alpha.3 Not specified
CNA Google @a2ui/web Core affected 0.9.1-alpha.4 Not specified
CNA Google @a2ui/web Core affected 0.9.1-alpha.5 Not specified
CNA Google @a2ui/web Core affected 0.9.1 Not specified
CNA Google @a2ui/web Core affected 0.9.2 Not specified
CNA Google @a2ui/web Core affected 0.10.0 Not specified
CNA Google @a2ui/web Core affected 0.10.1 Not specified

References

ReferenceSourceLinkTags
github.com/a2ui-project/a2ui/security/advisories/GHSA-72qq-p3r5-f7wq [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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