How severe is CVE-2026-40028?

CVE-2026-40028 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-40028 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40028?

CVE-2026-40028 affects Yamato-security Hayabusa. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40028?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-40028 have an EU (EUVD) identifier?

Yes. CVE-2026-40028 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20767.

When was CVE-2026-40028 published?

CVE-2026-40028 was published on 2026-04-08 and last updated on 2026-06-17.

CVE-2026-40028

CVE-2026-40028 is a medium-severity vulnerability in Yamato-security Hayabusa with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 5.1
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20767
Weakness: CWE-79
Affected product: Yamato-security Hayabusa
Published: 2026-04-08
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-40028?: 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.
How severe is CVE-2026-40028?: CVE-2026-40028 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-40028 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40028?: CVE-2026-40028 affects Yamato-security Hayabusa. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40028?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40028 have an EU (EUVD) identifier?: Yes. CVE-2026-40028 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20767.
When was CVE-2026-40028 published?: CVE-2026-40028 was published on 2026-04-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:yamato-security:hayabusa:*:*:*:*:*:*:*:*

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