CPython: Schwachstelle ermöglicht Denial of Service
WID-SEC-2026-2272 · first 10.07.2026 · updated 26.10.2026 · CVSS 7,5
What it is about
Python ist eine universelle, üblicherweise interpretierte, höhere Programmiersprache. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in CPython ausnutzen, um einen Denial of Service Angriff durchzuführen.
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
- einen Denial of Service Angriff durchzuführen
Am I affected?
Affected according to the BSI:
- IBM AIX 7.3
- IBM VIOS 4.1
- Google Container-Optimized OS
- Debian Linux
- Amazon Linux 2
- Red Hat Enterprise Linux
- Fedora Linux
- Microsoft Azure Linux azl3
- RESF Rocky Linux
- SUSE Linux
- SUSE openSUSE
- Ubuntu Linux
and 3 more
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source Python CPython <=3.15.0
- Dell Secure Connect Gateway 5.36.00.16
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-7qj2-q5c8-cxx5 vom 2026-07-09 github.com
- Red Hat Security Advisory RHSA-2026:38017 vom 2026-07-10 access.redhat.com
- Red Hat Security Advisory RHSA-2026:38018 vom 2026-07-10 access.redhat.com
- Red Hat Security Advisory RHSA-2026:39320 vom 2026-07-14 access.redhat.com
- Red Hat Security Advisory RHSA-2026:39183 vom 2026-07-14 access.redhat.com
- Microsoft Leitfaden für Sicherheitsupdates vom 2026-07-14 msrc.microsoft.com
- Red Hat Security Advisory RHSA-2026:39771 vom 2026-07-15 access.redhat.com
- Red Hat Security Advisory RHSA-2026:39798 vom 2026-07-15 access.redhat.com
- Red Hat Security Advisory RHSA-2026:39893 vom 2026-07-15 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:39893 vom 2026-07-16 errata.build.resf.org
- Rocky Linux Security Advisory RLSA-2026:39183 vom 2026-07-15 errata.build.resf.org
- Rocky Linux Security Advisory RLSA-2026:39320 vom 2026-07-15 errata.build.resf.org
- Oracle Linux Security Advisory ELSA-2026-39893 vom 2026-07-16 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2026-39320 vom 2026-07-16 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2026-39771 vom 2026-07-16 linux.oracle.com
- Rocky Linux Security Advisory RLSA-2026:39798 vom 2026-07-16 errata.build.resf.org
- Rocky Linux Security Advisory RLSA-2026:39771 vom 2026-07-16 errata.build.resf.org
- Red Hat Security Advisory RHSA-2026:40856 vom 2026-07-16 access.redhat.com
- Oracle Linux Security Advisory ELSA-2026-39798 vom 2026-07-16 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2026-40856 vom 2026-07-17 linux.oracle.com
- Red Hat Security Advisory RHSA-2026:41949 vom 2026-07-21 access.redhat.com
- Oracle Linux Security Advisory ELSA-2026-39183 vom 2026-07-22 oss.oracle.com
- Rocky Linux Security Advisory RLSA-2026:41949 vom 2026-07-22 errata.build.resf.org
- Rocky Linux Security Advisory RLSA-2026:40856 vom 2026-07-22 errata.build.resf.org
- Oracle Linux Security Advisory ELSA-2026-41949 vom 2026-07-23 linux.oracle.com
and 60 more sources in the original advisory
CVE: CVE-2026-15308
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.