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SUSE Python-Tornado Important Authorization Memory Issues 2026-2726-1

suse
Calendar Grey July 2, 2026
Dist Suse Esm H88
Update available for Python-Tornado to address critical issues. Immediate action recommended for SUSE users to secure systems.
An update that solves three vulnerabilities can now be installed.

Summary

## This update for python-tornado fixes the following issues * CVE-2026-49853: authorization header forwarded across cross-origin redirects in SimpleAsyncHTTPClient (bsc#1268395). * CVE-2026-49854: out-of-bounds memory access via C extension (bsc#1268396). * CVE-2026-49855: AsyncHTTPClient accumulates decompressed chunks without size limit (bsc#1268397). ## 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 Enterprise Server 15 SP6 LTSS zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-2726=1 * SUSE Linux Enterprise Server 15 SP5 LTSS zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-2726=1

Topics%20covered

Topics Covered

security advisory SuSE important memory access authorization issue python-tornado

References

* bsc#1268395

* bsc#1268396

* bsc#1268397

Cross-

* CVE-2026-49853

* CVE-2026-49854

* CVE-2026-49855

CVSS scores:

* CVE-2026-49853 ( SUSE ): 7.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

* CVE-2026-49854 ( SUSE ): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

* CVE-2026-49855 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products:

* Basesystem Module 15-SP7

* 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

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2726-1
Release Date: 2026-07-02T13:55:02Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE important memory access authorization issue python-tornado

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