What is CVE-2026-65916?

CVE-2026-65916 is a high-severity vulnerability in Usmannasir Cyberpanel, classified under Missing Authorization. CVSS score: 8.1/10. Published 2026-07-23.

How severe is CVE-2026-65916?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Usmannasir Cyberpanel

CVE-2026-65916

CyberPanel through 1.9.1, fixed in commit b198460, contains a missing authorization vulnerability in the cancelBackupCreation handler that allows authenticated users to kill, delete, and corrupt other tenants' backups. Attackers can send crafted POST requests with arbitrary backupCancellationDomain and fileName parameters to terminate backup processes, delete backup archives, corrupt backup status files, and remove database records belonging to other tenants.

Vulnerability class: Broken Access Control

EPSS: 0.005 (40.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

Affected products

Usmannasir Cyberpanel — versions 0, b1984603f9b0099b39bca46fea176e53b6d4d601

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (issue-tracking, technical-description, exploit)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-65916?: CVE-2026-65916 is a high-severity vulnerability in Usmannasir Cyberpanel, classified under Missing Authorization. CVSS score: 8.1/10. Published 2026-07-23.
How severe is CVE-2026-65916?: High severity. CVSS v3 base score is 8.1 out of 10.