SUSE SLES12 Security Update : prometheus-ha_cluster_exporter (SUSE-SU-2026:3421-1)

high Nessus Plugin ID 331421

Synopsis

The remote SUSE host is missing a security update.

Description

The remote SUSE Linux SLES_SAP12 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2026:3421-1 advisory.

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

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected prometheus-ha_cluster_exporter package.

Plugin Details

Severity: High

ID: 331421

File Name: suse_SU-2026-3421-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 7/31/2026

Updated: 7/31/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.8

Percentile: 57.7

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

CVSS Score Source: CVE-2026-39821

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:novell:suse_linux:12, p-cpe:/a:novell:suse_linux:prometheus-ha_cluster_exporter

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 7/30/2026

Vulnerability Publication Date: 5/12/2026

Reference Information

CVE: CVE-2026-39821

SuSE: SUSE-SU-2026:3421-1

Detections

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