<div class="container">
<h1>Security update for cosign</h1>
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-SU-2026:2365-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2026-06-11T07:58:20Z</td>
</tr>
<tr>
<th>Rating:</th>
<td>moderate</td>
</tr>
<tr>
<th>References:</th>
<td>
<ul>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1261859">bsc#1261859</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-2026-39395.html">CVE-2026-39395</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-2026-39395</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">6.9</span>
<span class="cvss-vector">CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-39395</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">6.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-39395</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">4.3</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2026-39395</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:N/I:L/A:N</span>
</li>
</ul>
</td>
</tr>
<tr>
<th>Affected Products:</th>
<td>
<ul class="list-group">
<li class="list-group-item">Basesystem Module 15-SP7</li>
<li class="list-group-item">openSUSE Leap 15.4</li>
<li class="list-group-item">SUSE Linux Enterprise Desktop 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Real Time 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 15 SP7</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 cosign fixes the following issue</p>
<ul>
<li>CVE-2026-39395: Incorrect attestation verification due to malformed payloads or mismatched predicate types
(bsc#1261859).</li>
</ul>
<p>Changes for cosign:</p>
<ul>
<li>update to 3.0.6:</li>
<li>Fix DSSE predicate check (GHSA-w6c6-c85g-mmv6) (#4801)</li>
<li>Handle whitespace-only certificate annotation (#4760)</li>
<li>fix(sign): closing SignerVerifier too early when signing with
a security key (#4761)</li>
<li>Disallow --new-bundle-format and --rfc3161-timestamp (#4762)</li>
<li>support managed keys in conformance testing (#4728)</li>
<li>Add support for GCE metadata server env var (#4732)</li>
<li>fix: preserve per-layer annotations in
WriteAttestationsReferrer (#4709)</li>
<li>Fix parsing of in-toto for string predicates</li>
<li>Mark batch of flags for deprecation (#4698)</li>
<li>disallow key and cert identity being used together
during verification (#4636)</li>
<li>support key creation in GitLab group (#4704)</li>
<li>Set CGO_ENABLED=1 for fixing s390x failed build</li>
<li>build against a maintained golang version (upstream uses go1.20)</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">
openSUSE Leap 15.4
<br/>
<code>zypper in -t patch SUSE-2026-2365=1</code>
</li>
<li class="list-group-item">
Basesystem Module 15-SP7
<br/>
<code>zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-2365=1</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
openSUSE Leap 15.4 (aarch64 ppc64le s390x x86_64 i586)
<ul>
<li>cosign-3.0.6-150400.3.42.1</li>
<li>cosign-debuginfo-3.0.6-150400.3.42.1</li>
</ul>
</li>
<li>
openSUSE Leap 15.4 (noarch)
<ul>
<li>cosign-bash-completion-3.0.6-150400.3.42.1</li>
<li>cosign-zsh-completion-3.0.6-150400.3.42.1</li>
<li>cosign-fish-completion-3.0.6-150400.3.42.1</li>
</ul>
</li>
<li>
Basesystem Module 15-SP7 (aarch64 ppc64le s390x x86_64)
<ul>
<li>cosign-3.0.6-150400.3.42.1</li>
<li>cosign-debuginfo-3.0.6-150400.3.42.1</li>
</ul>
</li>
<li>
Basesystem Module 15-SP7 (noarch)
<ul>
<li>cosign-bash-completion-3.0.6-150400.3.42.1</li>
<li>cosign-zsh-completion-3.0.6-150400.3.42.1</li>
</ul>
</li>
</ul>
<h2>References:</h2>
<ul>
<li>
<a href="https://www.suse.com/security/cve/CVE-2026-39395.html">https://www.suse.com/security/cve/CVE-2026-39395.html</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1261859">https://bugzilla.suse.com/show_bug.cgi?id=1261859</a>
</li>
</ul>
</div>