SUSE-SU-2026:22344-1: moderate: Security update for cosign

[SLE-SECURITY-UPDATES]

# Security update for cosign

Announcement ID: SUSE-SU-2026:22344-1  
Release Date: 2026-06-22T15:12:24Z  
Rating: moderate  
References:

  * bsc#1261859
  * jsc#SLE-23879

  
Cross-References:

  * CVE-2026-39395

  
CVSS scores:

  * CVE-2026-39395 ( SUSE ):  6.9
    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
  * CVE-2026-39395 ( SUSE ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
  * CVE-2026-39395 ( NVD ):  4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
  * CVE-2026-39395 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

  
Affected Products:

  * SUSE Linux Enterprise Server 16.0
  * SUSE Linux Enterprise Server for SAP applications 16.0

  
  
An update that solves one vulnerability and contains one feature can now be
installed.

## Description:

This update for cosign fixes the following issues

Security issue:

  * CVE-2026-39395: Incorrect attestation verification due to malformed payloads
    or mismatched predicate types (bsc#1261859).

Non security issue:

  * Update to version 3.0.5 (jsc#SLE-23879).

## 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 16.0  
    zypper in -t patch SUSE-SLES-16.0-1049=1

  * SUSE Linux Enterprise Server for SAP applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-1049=1

## Package List:

  * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
    * cosign-3.0.6-160000.1.1
    * cosign-debuginfo-3.0.6-160000.1.1
  * SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
    * cosign-3.0.6-160000.1.1
    * cosign-debuginfo-3.0.6-160000.1.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-39395.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1261859
  * https://jira.suse.com/browse/SLE-23879

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