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CVE-2026-65916— CyberPanel Missing Authorization in cancelBackupCreation Handler

Quick assessment

Affected
usmannasir cyberpanel
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

usmannasir cyberpanel是usmannasir的Web中间件。 usmannasir CyberPanel 1.9.1及之前版本存在授权问题漏洞，该漏洞源于cancelBackupCreation handler缺少授权，可能导致经过身份验证的攻击者发送特制POST请求，带有任意的 backupCancellationDomain 和 fileName 参数，来终止备份进程、删除备份存档、损坏备份状态文件以及其他租户的数据库记录。

CVSS 8.1 · High EPSS 0.49% · P40

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood

Affected Version Matrix 2

VendorProduct Version RangeStatus
usmannasir cyberpanel ≤ 1.9.1 affected
b1984603f9b0099b39bca46fea176e53b6d4d601 unaffected
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I. Basic Information for CVE-2026-65916

Vulnerability Information
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Vulnerability Title
CyberPanel Missing Authorization in cancelBackupCreation Handler
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
usmannasir CyberPanel 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
usmannasir cyberpanel是usmannasir的Web中间件。 usmannasir CyberPanel 1.9.1及之前版本存在授权问题漏洞，该漏洞源于cancelBackupCreation handler缺少授权，可能导致经过身份验证的攻击者发送特制POST请求，带有任意的 backupCancellationDomain 和 fileName 参数，来终止备份进程、删除备份存档、损坏备份状态文件以及其他租户的数据库记录。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
usmannasir cyberpanel 0 ~ 1.9.1 -

II. Public POCs for CVE-2026-65916

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 8485 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-65916

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Patches & Fixes for CVE-2026-65916 (1)

Vendor Advisories for CVE-2026-65916 (1)

Proof of Concept for CVE-2026-65916 (1)

IV. Related Vulnerabilities

Same product: cyberpanel
Same vendor: usmannasir
Same weakness: CWE-862

V. Comments for CVE-2026-65916

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