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SUSE Python-Tornado Important Auth and Memory Fix 2026-3291-1

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Calendar Grey July 27, 2026
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Three vulnerabilities in python-tornado have been addressed with this important SUSE security update. Install recommended.
SUSE has released a security update for python-tornado addressing three vulnerabilities that affect multiple SUSE Linux Enterprise products, prompting users to apply the update imm...

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 Manager Client Tools for SLE 12 zypper in -t patch SUSE-SLE-Manager-Tools-12-2026-3291=1 ## Package List: * SUSE Manager Client Tools for SLE 12 (aarch64 ppc64le s390x x86_64) * python-tornado-debugsource-4.2.1-17.21.1

Topics%20covered

Topics Covered

security advisory SuSE access control important memory issues 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-2026-49853 ( NVD ): 7.7 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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-2026-49854 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/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

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

Affected Products:

* SUSE Linux Enterprise Desktop 12

* SUSE Linux Enterprise Desktop 12 SP1

* SUSE Linux Enterprise Desktop 12 SP2

* SUSE Linux Enterprise Desktop 12 SP3

* SUSE Linux Enterprise Desktop 12 SP4

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:3291-1
Release Date: 2026-07-27T15:15:54Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE access control important memory issues python-tornado

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