Link following in Froxlor - CVE-2026-41236
Published: June 29, 2026
Vulnerability identifier: #VU135774
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-41236
CWE-ID: CWE-59
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: froxlor
Affected software:
Froxlor
Froxlor
Detailed vulnerability description
The vulnerability allows a remote user to escalate privileges to root.
The vulnerability exists due to improper link resolution before file access in the SSH key synchronization path for ~/.ssh/authorized_keys when processing SSH key synchronization for a customer-controlled home directory. A remote user can replace ~/.ssh/authorized_keys with a symbolic link to /root/.ssh/authorized_keys and submit a public key to escalate privileges to root.
Exploitation requires a shell-enabled customer account, control over the assigned home directory, and execution of the root-owned cron synchronization task.
How to mitigate CVE-2026-41236
Install security update from vendor's website.