CVE-2026-73537 Cross-site scripting in Miraikan Assist App Android version
Attackers can execute arbitrary scripts in the app's WebView, altering displayed content for users of the Miraikan Assist App.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-73537?
CVE-2026-73537 is a medium-severity cross-site scripting vulnerability in Japan Science and Technology Agency (JST) Miraikan Assist App Android version, published on 21 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-73537?
How do I fix CVE-2026-73537?
No fix has been published for CVE-2026-73537 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-73537 being exploited?
There is no known exploitation of CVE-2026-73537 in the wild and no public exploit code.
Sources
Also known as GHSA-599w-xgxp-wr28.