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SUSE Python312 Major Header Injection Buffer Overflow 2026-20952-1

suse
Calendar Grey April 7, 2026
Dist Suse Esm H88
Update for python311 addresses important security issues, including header injection and validation bypass flaws. Install recommended patches.
An update that solves two vulnerabilities can now be installed.

Summary

## This update for python311 fixes the following issues: * CVE-2026-1299: header injection when an email is serialized due to improper newline quoting (bsc#1257181). * CVE-2026-2297: validation bypass via incorrectly handled hook in FileLoader (bsc#1259240). ## 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: * SUSE Linux Micro 6.1 zypper in -t patch SUSE-SLE-Micro-6.1-465=1 ## Package List: * SUSE Linux Micro 6.1 (aarch64 ppc64le s390x x86_64) * python311-3.11.15-slfo.1.1_2.1 * python311-curses-3.11.15-slfo.1.1_2.1 * libpython3_11-1_0-3.11.15-slfo.1.1_2.1 * python311-base-3.11.15-slfo.1.1_2.1 * python311-debuginfo-3.11.15-slfo.1.1_2.1

Topics%20covered

Topics Covered

security advisory SuSE important header injection validation bypass python311

References

* bsc#1257181

* bsc#1259240

Cross-

* CVE-2026-1299

* CVE-2026-2297

CVSS scores:

* CVE-2026-1299 ( SUSE ): 8.3

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

* CVE-2026-1299 ( SUSE ): 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

* CVE-2026-1299 ( NVD ): 6.0

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

* CVE-2026-2297 ( SUSE ): 5.7

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

* CVE-2026-2297 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

* CVE-2026-2297 ( NVD ): 5.7

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:20951-1
Release Date: 2026-03-31T09:07:06Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE important header injection validation bypass python311

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