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openSUSE 15.3 python3 Important Header Injection Fix 2026-1090-1

opensuse
Calendar Grey March 27, 2026
Dist Opensuse Esm H88
An important update fixes a header injection issue in python3 related to CVE-2026-1299 for openSUSE distributions.
An update that solves one vulnerability can now be installed.

Description

This update for python3 fixes the following issues:

* CVE-2026-1299: header injection when an email is serialized due to improper

newline quoting in BytesGenerator (bsc#1257181).

Topics%20covered

Topics Covered

security advisory important OpenSUSE header injection python3 cve-2026-1299

Patch

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like

YaST online_update or "zypper patch".

Alternatively you can run the command listed for your product:

* openSUSE Leap 15.3

zypper in -t patch SUSE-2026-1090=1

* openSUSE Leap 15.6

zypper in -t patch openSUSE-SLE-15.6-2026-1090=1

* SUSE Linux Enterprise Micro for Rancher 5.3

zypper in -t patch SUSE-SLE-Micro-5.3-2026-1090=1

* SUSE Linux Enterprise Micro 5.3

zypper in -t patch SUSE-SLE-Micro-5.3-2026-1090=1

* SUSE Linux Enterprise Micro for Rancher 5.4

zypper in -t patch SUSE-SLE-Micro-5.4-2026-1090=1

* SUSE Linux Enterprise Micro 5.4

zypper in -t patch SUSE-SLE-Micro-5.4-2026-1090=1

* SUSE Linux Enterprise Micro 5.5

zypper in -t patch SUSE-SLE-Micro-5.5-2026-1090=1

* Basesystem Module 15-SP7

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-1090=1

* Development Tools Module 15-SP7

zypper in -t patch SUSE-SLE-Module-Development-Tools-15-SP7-2026-1090=1

* SUSE Linux Enterprise High Performance...

Read the Full Advisory

Package List

* openSUSE Leap 15.3 (aarch64 ppc64le s390x x86_64 i586)

* python3-core-debugsource-3.6.15-150300.10.109.1

* python3-idle-3.6.15-150300.10.109.1

* python3-devel-debuginfo-3.6.15-150300.10.109.1

* python3-testsuite-3.6.15-150300.10.109.1

* python3-base-debuginfo-3.6.15-150300.10.109.1

* python3-tk-debuginfo-3.6.15-150300.10.109.1

* python3-doc-3.6.15-150300.10.109.1

* python3-curses-debuginfo-3.6.15-150300.10.109.1

* python3-testsuite-debuginfo-3.6.15-150300.10.109.1

* python3-base-3.6.15-150300.10.109.1

* python3-curses-3.6.15-150300.10.109.1

* python3-tk-3.6.15-150300.10.109.1

* python3-dbm-3.6.15-150300.10.109.1

* libpython3_6m1_0-3.6.15-150300.10.109.1

* python3-debugsource-3.6.15-150300.10.109.1

* libpython3_6m1_0-debuginfo-3.6.15-150300.10.109.1

* python3-tools-3.6.15-150300.10.109.1

* python3-3.6.15-150300.10.109.1

* python3-debuginfo-3.6.15-150300.10.109.1

* python3-doc-devhelp-3.6.15-150300.10.109.1

* python3-dbm-debuginfo-3.6.15-150300.10.109.1

* python3-devel-3.6.15-150300.10.109.1

* openSUSE Leap...

Read the Full Advisory

References

* bsc#1257181

## References:

* https://www.suse.com/security/cve/CVE-2026-1299.html

* https://bugzilla.suse.com/show_bug.cgi?id=1257181

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:1090-1
Release Date: 2026-03-26T17:46:03Z
Affected Products: * Basesystem Module 15-SP7 * Development Tools Module 15-SP7 * openSUSE Leap 15.3 * openSUSE Leap 15.6 * SUSE Linux Enterprise Desktop 15 SP7 * SUSE Linux Enterprise High Performance Computing 15 SP4 * SUSE Linux Enterprise High Performance Computing 15 SP5 * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 * SUSE Linux Enterprise Micro 5.2 * SUSE Linux Enterprise Micro 5.3 * SUSE Linux Enterprise Micro 5.4 * SUSE Linux Enterprise Micro 5.5 * SUSE Linux Enterprise Micro for Rancher 5.2 * SUSE Linux Enterprise Micro for Rancher 5.3 * SUSE Linux Enterprise Micro for Rancher 5.4 * SUSE Linux Enterprise Real Time 15 SP7 * SUSE Linux Enterprise Server 15 SP4 * SUSE Linux Enterprise Server 15 SP4 LTSS * SUSE Linux Enterprise Server 15 SP5 * SUSE Linux Enterprise Server 15 SP5 LTSS * SUSE Linux Enterprise Server 15 SP6 * SUSE Linux Enterprise Server 15 SP6 LTSS * SUSE Linux Enterprise Server 15 SP7 * SUSE Linux Enterprise Server for SAP Applications 15 SP4 * SUSE Linux Enterprise Server for SAP Applications 15 SP5 * SUSE Linux Enterprise Server for SAP Applications 15 SP6 * SUSE Linux Enterprise Server for SAP Applications 15 SP7

Topics%20covered

Topics Covered

security advisory important OpenSUSE header injection python3 cve-2026-1299

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