cPanel cPanel/WHM (Archive-Tar): Mehrere Schwachstellen ermöglichen Manipulation von Dateien
WID-SEC-2026-2666 · first 06.08.2026 · updated 07.08.2026 · CVSS 9,1
What it is about
cPanel ist eine Software für die Verwaltung von Webhosting Auftritten. Die Software ermöglicht es dem Endanwender, Statistiken einzusehen, neue Benutzeraccounts anzulegen, Maileinstellungen zu verändern und vieles mehr. Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in cPanel cPanel/WHM ausnutzen, um vertrauliche Informationen preiszugeben oder Daten zu manipulieren.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- vertrauliche Informationen preiszugeben oder Daten zu manipulieren
Am I affected?
Affected according to the BSI:
- cPanel cPanel/WHM <134.0.49
- cPanel cPanel/WHM <137.9999.104
- cPanel cPanel/WHM Archive-Tar <3.12
- cPanel cPanel/WHM <136.0.33
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- cPanel cPanel/WHM 134.0.49
- cPanel cPanel/WHM 137.9999.104
- cPanel cPanel/WHM Archive-Tar 3.12
- cPanel cPanel/WHM 136.0.33
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- cPanel & WHM Change Log vom 2026-08-05 docs.cpanel.net
- cPanel & WHM Change Log vom 2026-08-05 docs.cpanel.net
- cPanel & WHM Change Log vom 2026-08-06 docs.cpanel.net
CVE: CVE-2026-42496, CVE-2026-42497
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.