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Critial Litespeed 6.3.7. update Sep 14, 2026 18:30 - Sep 15, 2026 18:30 EDT
A critical privilege-escalation vulnerability has been identified in LiteSpeed Web Server Enterprise. On shared-hosting servers, a malicious low-privilege website user could potentially gain root-level access to the server.
This issue can bypass expected account isolation controls, including CageFS, allowing a malicious website user to potentially escape its restricted environment and gain root-level access to the server.
Impact
Currently affected versions are LiteSpeed Web Server Enterprise versions prior to v6.3.7.
All cpanel and directadmin shared hosting servers have been upgraded to 6.3.7.
Users who have litespeed enterprise installed: Please run the following command to perform an update to LiteSpeed v6.3.7:
/usr/local/lsws/admin/misc/lsup.sh -f -v 6.3.7
Posted on Sep 14, 2026 - 18:26 EDT
This issue can bypass expected account isolation controls, including CageFS, allowing a malicious website user to potentially escape its restricted environment and gain root-level access to the server.
Impact
Currently affected versions are LiteSpeed Web Server Enterprise versions prior to v6.3.7.
All cpanel and directadmin shared hosting servers have been upgraded to 6.3.7.
Users who have litespeed enterprise installed: Please run the following command to perform an update to LiteSpeed v6.3.7:
/usr/local/lsws/admin/misc/lsup.sh -f -v 6.3.7
Posted on Sep 14, 2026 - 18:26 EDT
