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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (41.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Usmannasir Cyberpanel — versions 0, b1984603f9b0099b39bca46fea176e53b6d4d601
Weakness classification (CWE)
References
- github.com/usmannasir/cyberpanel/commit/b1984603f9b0099b39bca46fea176e53b6d4d601 (patch)
- github.com/usmannasir/cyberpanel/issues/1829 (issue-tracking, technical-description, exploit)
- www.vulncheck.com/advisories/cyberpanel-missing-authorization-in-cancelbackupcr… (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.