CVE-2026-40028 Hayabusa < 3.8.0 XSS via JSON Log Import
Attackers can inject JavaScript into JSON logs to execute code in forensic examiners' browsers when viewing HTML reports.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-40028?
CVE-2026-40028 is a medium-severity cross-site scripting vulnerability in Yamato-Security hayabusa, published on 8 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Hayabusa versions prior to 3.8.0 contain a cross-site scripting (XSS) vulnerability in its HTML report output that allows an attacker to execute arbitrary JavaScript when a user scans JSON-exported logs containing malicious content in the Computer field. An attacker can inject JavaScript into the Computer field of JSON logs that executes in the forensic examiner's browser session when viewing the generated HTML report, leading to information disclosure or code execution.
Weakness: CWE-79
Which versions are affected by CVE-2026-40028?
It affects 1 product.
Products include Yamato-Security Hayabusa.
How do I fix CVE-2026-40028?
No fix has been published for CVE-2026-40028 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-2026-40028 being exploited?
There is no known exploitation of CVE-2026-40028 in the wild and no public exploit code.
Sources
Also known as GHSA-jpj3-m5q9-54rf.