SUSE-SU-2026:3421-1: important: Security update for prometheus-ha_cluster_exporter

[SLE-UPDATES]

# Security update for prometheus-ha_cluster_exporter

Announcement ID: SUSE-SU-2026:3421-1  
Release Date: 2026-07-30T07:37:12Z  
Rating: important  
References:

  * bsc#1266552
  * jsc#PED-2560

  
Cross-References:

  * CVE-2026-39821

  
CVSS scores:

  * CVE-2026-39821 ( SUSE ):  9.1
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-39821 ( SUSE ):  7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-39821 ( NVD ):  9.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
  * CVE-2026-39821 ( NVD ):  8.2 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

  
Affected Products:

  * SUSE Linux Enterprise Server for SAP Applications 12 SP5

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

## Description:

This update for prometheus-ha_cluster_exporter fixes the following issue:

  * CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only
    Punycode-encoded labels allows for validation bypass and privilege
    escalation (bsc#1266552).

Other updates and bugfixes:

  * Release 1.4.2
  * Use proper obs time format on changes generation.
  * Upgrade x/net to 0.57.
  * Full changelog *:
    https://github.com/ClusterLabs/ha_cluster_exporter/compare/1.4.1...1.4.2
  * Release 1.4.1
  * Upgrade to use go 1.25.
  * Bump github.com/prometheus/common from 0.59.1 to 0.61.0.
  * Bump golang.org/x/net from 0.33.0 to 0.55.0.
  * Full changelog:
    https://github.com/ClusterLabs/ha_cluster_exporter/compare/1.4.0...1.4.1
  * Release 1.4.0
  * add support to show overall cluster maintenance mode.
  * add supportconfig plugin (jsc#PED-2560).
  * update the CI workflow.
  * change default OBS development project.
  * bump required Go version to 1.23.
  * fix corosync collector parser when using IPv6 hostnames (#245).
  * Bump github.com/prometheus/client_model from 0.3.0 to 0.4.0 .
  * Bump github.com/prometheus/client_golang from 1.15.0 to 1.15.1 .
  * Bump github.com/prometheus/common from 0.42.0 to 0.44.0.
  * Bump github.com/spf13/viper from 1.15.0 to 1.16.0.
  * Bump github.com/stretchr/testify from 1.8.2 to 1.8.4.
  * Bump github.com/prometheus/client_golang from 1.15.1 to 1.16.0.
  * Bump github.com/prometheus/client_golang from 1.16.0 to 1.17.0.
  * Bump golang.org/x/net from 0.10.0 to 0.17.0.
  * Bump github.com/prometheus/common from 0.44.0 to 0.55.0.
  * Bump github.com/spf13/viper from 1.16.0 to 1.19.0.
  * Bump actions/download-artifact from 3 to 4.1.7.
  * Bump github.com/prometheus/client_golang from 1.19.1 to 1.20.2.
  * Bump github.com/prometheus/common from 0.55.0 to 0.59.1.
  * Bump github.com/prometheus/client_golang from 1.20.2 to 1.20.4.
  * Bump github.com/prometheus/client_golang from 1.20.4 to 1.20.5.
  * Bump github.com/stretchr/testify from 1.9.0 to 1.10.0.
  * Bump golang.org/x/crypto from 0.26.0 to 0.31.0.
  * Full changelog:
    https://github.com/ClusterLabs/ha_cluster_exporter/compare/1.3.3...1.4.0

## 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 for SAP Applications 12 SP5  
    zypper in -t patch SUSE-SLE-SAP-12-SP5-2026-3421=1

## Package List:

  * SUSE Linux Enterprise Server for SAP Applications 12 SP5 (ppc64le x86_64)
    * prometheus-ha_cluster_exporter-1.4.2-4.34.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-39821.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1266552
  * https://jira.suse.com/browse/PED-2560

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