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CVE-2026-68490 is an incorrect-permissions vulnerability in cPanel & WHM CalDAV and CardDAV functionality. On affected systems, calendar and address-book storage permissions can permit a local user to access calendar events and contact information belonging to other cPanel accounts. The issue affects cPanel & WHM version 120 and later. Updates correct permissions for newly created calendar and address-book storage and repair unsafe permissions on existing accounts.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An incorrect-permissions flaw in cPanel CalDAV/CardDAV storage that permits a local tenant on the same shared-hosting server to read other cPanel accounts' calendar events and contacts, breaking tenant isolation. It is read-only and does not grant root access.
An information-disclosure vulnerability in cPanel & WHM's CalDAV and CardDAV service that permits a local server user to read calendar events and contacts belonging to other accounts.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.