<div class="container">
<h1>Security update for python-tornado</h1>
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-SU-2026:3291-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2026-07-27T15:15:54Z</td>
</tr>
<tr>
<th>Rating:</th>
<td>important</td>
</tr>
<tr>
<th>References:</th>
<td>
<ul>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1268395">bsc#1268395</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1268396">bsc#1268396</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1268397">bsc#1268397</a>
</li>
</ul>
</td>
</tr>
<tr>
<th>
Cross-References:
</th>
<td>
<ul>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-49853.html">CVE-2026-49853</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-49854.html">CVE-2026-49854</a>
</li>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2026-49855.html">CVE-2026-49855</a>
</li>
</ul>
</td>
</tr>
<tr>
<th>CVSS scores:</th>
<td>
<ul class="list-group">
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-49853</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.4</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-49853</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">7.7</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-49854</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">3.7</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-49854</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">5.3</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-49855</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-49855</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">7.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H</span>
</li>
</ul>
</td>
</tr>
<tr>
<th>Affected Products:</th>
<td>
<ul class="list-group">
<li class="list-group-item">SUSE Linux Enterprise Desktop 12</li>
<li class="list-group-item">SUSE Linux Enterprise Desktop 12 SP1</li>
<li class="list-group-item">SUSE Linux Enterprise Desktop 12 SP2</li>
<li class="list-group-item">SUSE Linux Enterprise Desktop 12 SP3</li>
<li class="list-group-item">SUSE Linux Enterprise Desktop 12 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing 12 SP2</li>
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing 12 SP3</li>
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing 12 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise High Performance Computing 12 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise Server 12</li>
<li class="list-group-item">SUSE Linux Enterprise Server 12 SP1</li>
<li class="list-group-item">SUSE Linux Enterprise Server 12 SP2</li>
<li class="list-group-item">SUSE Linux Enterprise Server 12 SP3</li>
<li class="list-group-item">SUSE Linux Enterprise Server 12 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise Server 12 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 12</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 12 SP1</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 12 SP2</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 12 SP3</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 12 SP4</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 12 SP5</li>
<li class="list-group-item">SUSE Linux Enterprise Server for the Raspberry Pi 12-SP2</li>
<li class="list-group-item">SUSE Manager Client Tools for SLE 12</li>
</ul>
</td>
</tr>
</tbody>
</table>
<p>An update that solves three vulnerabilities can now be installed.</p>
<h2>Description:</h2>
<p>This update for python-tornado fixes the following issues</p>
<ul>
<li>CVE-2026-49853: authorization header forwarded across cross-origin redirects in SimpleAsyncHTTPClient (bsc#1268395).</li>
<li>CVE-2026-49854: out-of-bounds memory access via C extension (bsc#1268396).</li>
<li>CVE-2026-49855: AsyncHTTPClient accumulates decompressed chunks without size limit (bsc#1268397).</li>
</ul>
<h2>Patch Instructions:</h2>
<p>
To install this SUSE update use the SUSE recommended
installation methods like YaST online_update or "zypper patch".<br/>
Alternatively you can run the command listed for your product:
</p>
<ul class="list-group">
<li class="list-group-item">
SUSE Manager Client Tools for SLE 12
<br/>
<code>zypper in -t patch SUSE-SLE-Manager-Tools-12-2026-3291=1</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
SUSE Manager Client Tools for SLE 12 (aarch64 ppc64le s390x x86_64)
<ul>
<li>python-tornado-debugsource-4.2.1-17.21.1</li>
<li>python-tornado-debuginfo-4.2.1-17.21.1</li>
<li>python-tornado-4.2.1-17.21.1</li>
<li>python3-tornado-4.2.1-17.21.1</li>
</ul>
</li>
</ul>
<h2>References:</h2>
<ul>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-49853.html">https://www.suse.com/security/cve/CVE-2026-49853.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-49854.html">https://www.suse.com/security/cve/CVE-2026-49854.html</a>
</li>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-49855.html">https://www.suse.com/security/cve/CVE-2026-49855.html</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1268395">https://bugzilla.suse.com/show_bug.cgi?id=1268395</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1268396">https://bugzilla.suse.com/show_bug.cgi?id=1268396</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1268397">https://bugzilla.suse.com/show_bug.cgi?id=1268397</a>
</li>
</ul>
</div>