[NEW] [high] cPanel cPanel/WHM (Archive-Tar): Multiple vulnerabilities enable file manipulation

A remote, anonymous attacker can exploit multiple vulnerabilities in cPanel cPanel/WHM to disclose confidential information or manipulate data.

CSIRTS triage

What: Multiple vulnerabilities in cPanel/WHM (Archive-Tar) enable file manipulation and information disclosure.
Who is affected: cPanel/WHM instances accessible to remote unauthenticated attackers are vulnerable.
Urgency: High priority; remote unauthenticated exploitation is possible.
Action: Update cPanel/WHM to a version patching CVE-2026-42496 and CVE-2026-42497.

AI-assisted analysis generated from the source advisory — verify against the original.

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EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-424960.43% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 35% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-424970.42% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 34% of all EPSS-scored CVEs.

CVE	CSIRTS overview	External
CVE-2026-42496	coverage & exploitation status	NVD · CVE.org
CVE-2026-42497	coverage & exploitation status	NVD · CVE.org