A symlink-following vulnerability in the LiteSpeed cPanel plugin could allow attackers with FTP or web shell access to exploit shared hosting environments running CloudLinux/CageFS. The vulnerability is tracked as CVE-2026-54420 and requires patching by June 18, 2026. CISA recommends applying vendor mitigations or discontinuing use if patches are unavailable.

Why it matters in Western Canada: Canadian post-secondary institutions, government agencies, and small businesses commonly use shared cPanel hosting for email and web services. Organizations in Western Canada should verify whether their hosting providers use LiteSpeed and apply patches to prevent unauthorized file access.

CVEs: CVE-2026-54420

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Summary generated from the original advisory. Read the full source: cisa-kev