CPython: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen und Manipulation von Dateien
WID-SEC-2026-3656 · first 30.09.2026 · updated 27.10.2026 · CVSS 7,7
What it is about
Python ist eine universelle, üblicherweise interpretierte, höhere Programmiersprache. Ein lokaler Angreifer kann eine Schwachstelle in CPython ausnutzen, um Sicherheitsvorkehrungen zu umgehen und um Dateien zu manipulieren.
Under what conditions?
Only with access to the device or an account on it. Often the second step after a phishing email.
What can happen in the worst case
An attacker could use the vulnerability to
- Sicherheitsvorkehrungen zu umgehen
- Dateien zu manipulieren
Am I affected?
Affected according to the BSI:
- Red Hat Enterprise Linux
- RESF Rocky Linux
- SUSE openSUSE
- Oracle Linux
- Open Source Python CPython <3.15.0
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
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)
- CPython GitHub Pull Request vom 2026-09-29 github.com
- Mailing List OSS Security vom 2026-09-29 seclists.org
- Red Hat Security Advisory RHSA-2026:74922 vom 2026-10-02 access.redhat.com
- Red Hat Security Advisory RHSA-2026:74870 vom 2026-10-03 access.redhat.com
- Red Hat Security Advisory RHSA-2026:75119 vom 2026-10-03 access.redhat.com
- Red Hat Security Advisory RHSA-2026:85239 vom 2026-10-19 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:85239 vom 2026-10-21 errata.build.resf.org
- Oracle Linux Security Advisory ELSA-2026-85239 vom 2026-10-21 linux.oracle.com
- Red Hat Security Advisory RHSA-2026:89742 vom 2026-10-26 access.redhat.com
- openSUSE Security Update OPENSUSE-SU-2026:12125-1 vom 2026-10-25 lists.opensuse.org
- Oracle Linux Security Advisory ELSA-2026-89742 vom 2026-10-27 linux.oracle.com
- Rocky Linux Security Advisory RLSA-2026:89742 vom 2026-10-27 errata.build.resf.org
CVE: CVE-2026-12345
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.