Time-of-check Time-of-use (TOCTOU) Race Condition in Froxlor - CVE-2026-100713
Published: September 7, 2026 / Updated: September 28, 2026
Vulnerability identifier: #VU147272
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-100713
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to a time-of-check to time-of-use race condition in the SSH-key synchronization cron when racing a symlink swap in the customer's home directory. A local user can swap the .ssh directory with a symlink to redirect the cron's write to root's authorized_keys file.
Customer shell access must be enabled through the system.allow_customer_shell setting.
Affected software
Froxlor
How to mitigate CVE-2026-100713
Install security update from vendor's website.
Froxlor - update to 2.3.12