Perl: Schwachstelle ermöglicht Denial of Service
WID-SEC-2026-2717 · first 10.08.2026 · updated 26.10.2026 · CVSS 7,5
What it is about
Perl ist eine freie, plattformunabhängige und interpretierte Programmiersprache (Skriptsprache). Ein Angreifer kann eine Schwachstelle in Perl ausnutzen, um einen Denial of Service Angriff durchzuführen.
Under what conditions?
The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.
What can happen in the worst case
An attacker could use the vulnerability to
- einen Denial of Service Angriff durchzuführen
Am I affected?
Affected according to the BSI:
- IBM AIX 7.3
- IBM VIOS 4.1
- Amazon Linux 2
- IBM AIX 7.2
- Ubuntu Linux
- Open Source Perl
- cPanel cPanel/WHM <110.0.139
- cPanel cPanel/WHM <136.0.35
- cPanel cPanel/WHM <134.0.51
- cPanel cPanel/WHM <137.9999.118
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 110.0.139
- cPanel cPanel/WHM 136.0.35
- cPanel cPanel/WHM 134.0.51
- cPanel cPanel/WHM 137.9999.118
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)
- GitHub Security Advisory GHSA-2cxw-qmfc-3vx3 vom 2026-08-09 github.com
- cPanel 136 Change Log vom 2026-08-18 docs.cpanel.net
- cPanel 138 Change Log vom 2026-08-18 docs.cpanel.net
- cPanel 110 Change Log vom 2026-08-18 docs.cpanel.net
- cPanel 134 Change Log vom 2026-08-18 docs.cpanel.net
- Ubuntu Security Notice USN-8736-1 vom 2026-09-08 ubuntu.com
- Ubuntu Security Notice USN-8736-2 vom 2026-09-16 ubuntu.com
- IBM Security Bulletin 7289720 vom 2026-09-28 aix.software.ibm.com
- Amazon Linux Security Advisory ALAS2-2026-4026 vom 2026-10-25 alas.aws.amazon.com
CVE: CVE-2026-15534
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.