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Alerts This Week
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openSUSE Leap 16.0 Advisory 2026-21157-1 CVE-2026-39821 Important Fix

opensuse
Calendar Grey June 30, 2026
Dist Opensuse Esm H88
This openSUSE security update addresses an important issue in golang-github-prometheus-alertmanager, ensuring system integrity.
An update that solves one vulnerability and has one bug fix can now be installed.

Description

This update for golang-github-prometheus-alertmanager fixes the following issues:

Changes in golang-github-prometheus-alertmanager:

- CVE-2026-39821: Fix validation bypass and privilege escalation by

updating golang.org/x/net to version 0.55.0 (bsc#1266615)

Patch instructions:

To install this openSUSE security update use the suse recommended installation methods

like YaST online_update or "zypper patch".

Alternatively you can run the command listed for your product:

- openSUSE Leap 16.0

zypper in -t patch openSUSE-Leap-16.0-packagehub-352=1

Topics%20covered

Topics Covered

security advisory privilege escalation important OpenSUSE validation bypass golang-github-prometheus-alertmanager

Patch

Package List

- openSUSE Leap 16.0:

golang-github-prometheus-alertmanager-0.28.1-bp160.2.1

References

* bsc#1266615

References:

* https://www.suse.com/security/cve/CVE-2026-39821.html

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: openSUSE-SU-2026:21157-1
Rating: important
Affected Products: openSUSE Leap 16.0 -------------------------------------------------------------

Topics%20covered

Topics Covered

security advisory privilege escalation important OpenSUSE validation bypass golang-github-prometheus-alertmanager

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