SUSE-SU-2026:23052-1: important: Security update for helm

[SLE-SECURITY-UPDATES]

# Security update for helm

Announcement ID: SUSE-SU-2026:23052-1  
Release Date: 2026-08-04T10:45:48Z  
Rating: important  
References:

  * bsc#1266598
  * bsc#1270127
  * bsc#1271997

  
Cross-References:

  * CVE-2026-39821
  * CVE-2026-48978
  * CVE-2026-56852

  
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
  * CVE-2026-48978 ( SUSE ):  2.1
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-48978 ( SUSE ):  3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
  * CVE-2026-48978 ( NVD ):  2.1
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2026-56852 ( SUSE ):  6.0
    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-56852 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-56852 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * SUSE Linux Micro 6.0

  
  
An update that solves three vulnerabilities can now be installed.

## Description:

This update for helm fixes the following issues

Update to version 3.21.3.

  * CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only
    Punycode-encoded labels allows for validation bypass and privilege
    escalation (bsc#1266598).
  * CVE-2026-48978: oras.land/oras-go/v2/registry/remote/auth: missing
    validation in `auth.Client()` allows a malicious registry to hijack Bearer
    token realms to exfiltrate credentials and refresh tokens (bsc#1270127).
  * CVE-2026-56852: golang.org/x/text/unicode/norm: handling of input containing
    truncated/invalid UTF-8 input can lead to infinite loop (bsc#1271997).

Changes for helm:

  * Update `x/text` to 0.40.0.
  * Update `x/net` to 0.57.0.
  * Update to version 3.21.3:
  * Apply suggestions from code review 1ad6e68 (Benoit Tigeot).
  * fix: drop `containerd` v1 dep to resolve govulncheck CVEs 037733e (Benoit
    Tigeot).
  * chore(deps): bump `github.com/containerd/containerd` from 1.7.32 to 1.7.33
    d3e178b (dependabot[bot]).

## 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 Micro 6.0  
    zypper in -t patch SUSE-SLE-Micro-6.0-830=1

## Package List:

  * SUSE Linux Micro 6.0 (noarch)
    * helm-bash-completion-3.21.3-1.1
  * SUSE Linux Micro 6.0 (aarch64 s390x x86_64)
    * helm-debuginfo-3.21.3-1.1
    * helm-3.21.3-1.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-39821.html
  * https://www.suse.com/security/cve/CVE-2026-48978.html
  * https://www.suse.com/security/cve/CVE-2026-56852.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1266598
  * https://bugzilla.suse.com/show_bug.cgi?id=1270127
  * https://bugzilla.suse.com/show_bug.cgi?id=1271997

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