Vulnerability · Published Aug 21, 2026 · Assigned by jpcert
CVE-2026-73537
Medium 4.7
In plain English
A medium-severity cross-site scripting in Miraikan Assist App Android version from Japan Science and Technology Agency (JST). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).
Severity (CVSS 3.0)4.7Medium
Exploit odds (30 days)0.3%top 78.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Cross-site scripting vulnerability exists in Miraikan Assist App. If this vulnerability is exploited, an arbitrary script may be executed in the browser component (WebView) running on the affected product, resulting in the displayed content being altered.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Japan Science and Technology Agency (JST) | Miraikan Assist App Android version | 0 – before 1.1.7 |
| Japan Science and Technology Agency (JST) | Miraikan Assist App iOS version | 0 – before 1.0.7 |
Weakness: CWE-79 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N