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CVE-2026-65916 is a missing authorization vulnerability in CyberPanel through version 1.9.1 affecting the cancelBackupCreation handler. The flaw allows an authenticated user to submit crafted POST requests that supply arbitrary backupCancellationDomain and fileName values without proper authorization checks to verify ownership or tenant scope. As a result, a user can interfere with backup operations belonging to other tenants by terminating active backup processes, deleting backup archives, corrupting backup status tracking, and removing associated database records. The issue is remotely exploitable and enables cross-tenant tampering of backup-related resources.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.