<div class="container">
<h1>Security update for python-PyYAML</h1>
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-SU-2026:4402-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2026-09-30T08:58:27Z</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=1174514">bsc#1174514</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-2020-14343.html">CVE-2020-14343</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-2020-14343</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">8.8</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2020-14343</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">9.8</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H</span>
</li>
</ul>
</td>
</tr>
<tr>
<th>Affected Products:</th>
<td>
<ul class="list-group">
<li class="list-group-item">Public Cloud Module 12</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 12 SP5 LTSS</li>
<li class="list-group-item">SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security</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>
</ul>
</td>
</tr>
</tbody>
</table>
<p>An update that solves one vulnerability can now be installed.</p>
<h2>Description:</h2>
<p>This update for python-PyYAML fixes the following issues:</p>
<ul>
<li>
<p>Update to 5.3.1.</p>
</li>
<li>
<p>CVE-2020-14343: A vulnerability was discovered in the PyYAML library,
where it was susceptible to arbitrary code execution when it processes
untrusted YAML files through the full_load method or with the FullLoader
loader. Applications that use the library to process untrusted input
may be vulnerable to this flaw. This flaw allows an attacker to
execute arbitrary code on the system by abusing the python/object/new
constructor. This flaw is due to an incomplete fix for CVE-2020-1747.</p>
</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">
Public Cloud Module 12
<br/>
<code>zypper in -t patch SUSE-SLE-Module-Public-Cloud-12-2026-4402</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise Server 12 SP5 LTSS
<br/>
<code>zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-4402</code>
</li>
<li class="list-group-item">
SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
<br/>
<code>zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-4402</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
Public Cloud Module 12 (aarch64 ppc64le s390x x86_64)
<ul>
<li>python3-PyYAML-5.3.1-32.1</li>
<li>python3-PyYAML-debuginfo-5.3.1-32.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64)
<ul>
<li>python3-PyYAML-5.3.1-32.1</li>
<li>python3-PyYAML-debuginfo-5.3.1-32.1</li>
</ul>
</li>
<li>
SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
<ul>
<li>python3-PyYAML-5.3.1-32.1</li>
<li>python3-PyYAML-debuginfo-5.3.1-32.1</li>
</ul>
</li>
</ul>
<h2>References:</h2>
<ul>
<li>
<a href="https://www.suse.com/security/cve/CVE-2020-14343.html">https://www.suse.com/security/cve/CVE-2020-14343.html</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1174514">https://bugzilla.suse.com/show_bug.cgi?id=1174514</a>
</li>
</ul>
</div>