# 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.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N`)
- **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 available:** No
- **Published:** 8 Apr 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-jpj3-m5q9-54rf

## 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 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-40028?

It affects 1 product.


Products: 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.

## Is CVE-2026-40028 being exploited?

There is no known exploitation of CVE-2026-40028 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-40028 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-40028 in the wild and no public exploit code.

Affected product: Yamato-Security hayabusa. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-40028/ (Markdown: https://insights.sbomify.com/CVE-2026-40028/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-40028
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40028
- OSV: https://osv.dev/vulnerability/CVE-2026-40028

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-40028/
Summaries are generated and may contain mistakes; the official description above is the record.