How severe is CVE-2026-28674?

CVE-2026-28674 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-28674 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28674?

CVE-2026-28674 affects Danvei233 Xiaoheifs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28674?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-28674 have an EU (EUVD) identifier?

Yes. CVE-2026-28674 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12702.

When was CVE-2026-28674 published?

CVE-2026-28674 was published on 2026-03-18 and last updated on 2026-06-17.

CVE-2026-28674

CVE-2026-28674 is a high-severity vulnerability in Danvei233 Xiaoheifs with a CVSS 3.x base score of 7.2. 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-434.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12702
Weakness: CWE-434
Affected product: Danvei233 Xiaoheifs
Published: 2026-03-18
Last modified: 2026-06-17

Description

xiaoheiFS is a self-hosted financial and operational system for cloud service businesses. In versions up to and including 0.3.15, the `AdminPaymentPluginUpload` endpoint lets admins upload any file to `plugins/payment/`. It only checks a hardcoded password (`qweasd123456`) and ignores file content. A background watcher (`StartWatcher`) then scans this folder every 5 seconds. If it finds a new executable, it runs it immediately, resulting in RCE. Version 4.0.0 fixes the issue.

Frequently asked questions

What is CVE-2026-28674?: xiaoheiFS is a self-hosted financial and operational system for cloud service businesses. In versions up to and including 0.3.15, the `AdminPaymentPluginUpload` endpoint lets admins upload any file to `plugins/payment/`. It only checks a hardcoded password (`qweasd123456`) and ignores file content. A background watcher (`StartWatcher`) then scans this folder every 5 seconds. If it finds a new executable, it runs it immediately, resulting in RCE. Version 4.0.0 fixes the issue.
How severe is CVE-2026-28674?: CVE-2026-28674 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-28674 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28674?: CVE-2026-28674 affects Danvei233 Xiaoheifs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28674?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-28674 have an EU (EUVD) identifier?: Yes. CVE-2026-28674 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12702.
When was CVE-2026-28674 published?: CVE-2026-28674 was published on 2026-03-18 and last updated on 2026-06-17.

References

https://github.com/danvei233/xiaoheiFS/security/advisories/GHSA-hcj4-gfvq-qv4p

Affected products (1)

cpe:2.3:a:danvei233:xiaoheifs:*:*:*:*:*:*:*:*

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