{"id":"CVE-2026-10032","state":"PUBLISHED","title":"Arbitrary JavaScript Execution via openUrl in @a2ui/web_core","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.","publishedAt":"2026-08-04T15:36:45.199Z","updatedAt":"2026-08-04T17:43:20.898Z","severity":{"score":6.1,"label":"Medium","version":"4.0","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/E:U","source":"Google"},"assigner":"Google","products":["Google @a2ui/web_core"],"affected":[{"vendor":"Google","product":"@a2ui/web_core","defaultStatus":"unaffected","versions":[{"version":"0.9.0","status":"affected"},{"version":"0.9.1-alpha.0","status":"affected"},{"version":"0.9.1-alpha.1","status":"affected"},{"version":"0.9.1-alpha.2","status":"affected"},{"version":"0.9.1-alpha.3","status":"affected"},{"version":"0.9.1-alpha.4","status":"affected"},{"version":"0.9.1-alpha.5","status":"affected"},{"version":"0.9.1","status":"affected"},{"version":"0.9.2","status":"affected"},{"version":"0.10.0","status":"affected"},{"version":"0.10.1","status":"affected"}]}],"references":["https://github.com/a2ui-project/a2ui/security/advisories/GHSA-72qq-p3r5-f7wq"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:10:33.477Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/10xxx/CVE-2026-10032.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-10032","state":"PUBLISHED","datePublished":"2026-08-04T15:36:45.199Z","dateUpdated":"2026-08-04T17:43:20.898Z","assignerShortName":"Google","assignerOrgId":"14ed7db2-1595-443d-9d34-6215bf890778","dateReserved":"2026-05-28T18:45:17.761Z"},"containers":{"cna":{"title":"Arbitrary JavaScript Execution via openUrl in @a2ui/web_core","descriptions":[{"lang":"en","value":"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":[{"vendor":"Google","product":"@a2ui/web_core","defaultStatus":"unaffected","versions":[{"version":"0.9.0","status":"affected"},{"version":"0.9.1-alpha.0","status":"affected"},{"version":"0.9.1-alpha.1","status":"affected"},{"version":"0.9.1-alpha.2","status":"affected"},{"version":"0.9.1-alpha.3","status":"affected"},{"version":"0.9.1-alpha.4","status":"affected"},{"version":"0.9.1-alpha.5","status":"affected"},{"version":"0.9.1","status":"affected"},{"version":"0.9.2","status":"affected"},{"version":"0.10.0","status":"affected"},{"version":"0.10.1","status":"affected"}]}],"references":[{"url":"https://github.com/a2ui-project/a2ui/security/advisories/GHSA-72qq-p3r5-f7wq"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subAvailabilityImpact":"NONE","exploitMaturity":"UNREPORTED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":6.1,"vectorString":"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"Google","orgId":"14ed7db2-1595-443d-9d34-6215bf890778","dateUpdated":"2026-08-04T15:36:45.199Z"},"impacts":[{"capecId":"CAPEC-244","descriptions":[{"lang":"en","value":"CAPEC-244 Embedded Injection"}]}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.2"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-04T17:42:13.437105Z","id":"CVE-2026-10032","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-04T17:43:20.898Z"}}]}}}