SUSE-SU-2026:22233-1
Vulnerability from csaf_suse - Published: 2026-06-21 00:45 - Updated: 2026-06-21 00:45Summary
Security update for helm
Severity
Important
Notes
Title of the patch: Security update for helm
Description of the patch: This update for helm 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#1266598).
Changes for helm:
- Update to version 3.21.1:
* Fixed nil pointer panic that could happen with helm template in
ClientOnly flows. Now correctly returns a template error #31920
* Bumped golang.org/x/net to v0.55.0 to address GO-2026-5026
#32152
* Bumped Go from 1.25 to 1.26 #32168
* Dependency version updates
- chore(deps): bump oras.land/oras-go/v2 from 2.6.0 to 2.6.1
- chore(deps): bump golang.org/x/crypto from 0.52.0 to 0.53.0
- chore(deps): bump golang.org/x/term from 0.43.0 to 0.44.0
- chore(deps): bump golang.org/x/text from 0.37.0 to 0.38.0
- chore(deps): bump github.com/lib/pq from 1.11.2 to 1.12.3
- chore(deps): bump github.com/distribution/distribution/v3
- chore(deps): bump github.com/containerd/containerd from
1.7.30 to 1.7.32
- chore(deps): bump github.com/Masterminds/semver/v3 from 3.4.0
to 3.5.0
- chore(deps): bump github.com/mattn/go-shellwords from 1.0.12
to 1.0.13
- chore(deps): bump golang.org/x/crypto from 0.51.0 to 0.52.0
- chore(deps): bump k8s.io/klog/v2 from 2.130.1 to 2.140.0
- chore(deps): bump golang.org/x/text from 0.35.0 to 0.37.0
Patchnames: SUSE-SL-Micro-6.2-1006
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
7.4 (High)
Affected products
Recommended
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: SUSE Linux Micro 6.2:helm-3.21.1-160000.1.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Micro 6.2:helm-3.21.1-160000.1.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Micro 6.2:helm-3.21.1-160000.1.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Micro 6.2:helm-bash-completion-3.21.1-160000.1.1.noarch | — |
Vendor Fix
|
Threats
Impact
important
References
8 references
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"text": "This update for helm fixes the following issue\n\n- CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only Punycode-encoded labels allows for validation\n bypass and privilege escalation (bsc#1266598).\n\nChanges for helm:\n\n- Update to version 3.21.1:\n\n * Fixed nil pointer panic that could happen with helm template in\n ClientOnly flows. Now correctly returns a template error #31920\n * Bumped golang.org/x/net to v0.55.0 to address GO-2026-5026\n #32152\n * Bumped Go from 1.25 to 1.26 #32168\n * Dependency version updates\n - chore(deps): bump oras.land/oras-go/v2 from 2.6.0 to 2.6.1\n - chore(deps): bump golang.org/x/crypto from 0.52.0 to 0.53.0\n - chore(deps): bump golang.org/x/term from 0.43.0 to 0.44.0\n - chore(deps): bump golang.org/x/text from 0.37.0 to 0.38.0\n - chore(deps): bump github.com/lib/pq from 1.11.2 to 1.12.3\n - chore(deps): bump github.com/distribution/distribution/v3\n - chore(deps): bump github.com/containerd/containerd from\n 1.7.30 to 1.7.32\n - chore(deps): bump github.com/Masterminds/semver/v3 from 3.4.0\n to 3.5.0\n - chore(deps): bump github.com/mattn/go-shellwords from 1.0.12\n to 1.0.13\n - chore(deps): bump golang.org/x/crypto from 0.51.0 to 0.52.0\n - chore(deps): bump k8s.io/klog/v2 from 2.130.1 to 2.140.0\n - chore(deps): bump golang.org/x/text from 0.35.0 to 0.37.0\n",
"title": "Description of the patch"
},
{
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"text": "SUSE-SL-Micro-6.2-1006",
"title": "Patchnames"
},
{
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"title": "Terms of use"
}
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"references": [
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"category": "external",
"summary": "SUSE ratings",
"url": "https://www.suse.com/support/security/rating/"
},
{
"category": "self",
"summary": "URL of this CSAF notice",
"url": "https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_22233-1.json"
},
{
"category": "self",
"summary": "URL for SUSE-SU-2026:22233-1",
"url": "https://www.suse.com/support/update/announcement/2026/suse-su-202622233-1/"
},
{
"category": "self",
"summary": "E-Mail link for SUSE-SU-2026:22233-1",
"url": "https://lists.suse.com/pipermail/sle-updates/2026-June/047475.html"
},
{
"category": "self",
"summary": "SUSE Bug 1266598",
"url": "https://bugzilla.suse.com/1266598"
},
{
"category": "self",
"summary": "SUSE CVE CVE-2026-39821 page",
"url": "https://www.suse.com/security/cve/CVE-2026-39821/"
}
],
"title": "Security update for helm",
"tracking": {
"current_release_date": "2026-06-21T00:45:47Z",
"generator": {
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"engine": {
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},
"id": "SUSE-SU-2026:22233-1",
"initial_release_date": "2026-06-21T00:45:47Z",
"revision_history": [
{
"date": "2026-06-21T00:45:47Z",
"number": "1",
"summary": "Current version"
}
],
"status": "final",
"version": "1"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version",
"name": "helm-3.21.1-160000.1.1.aarch64",
"product": {
"name": "helm-3.21.1-160000.1.1.aarch64",
"product_id": "helm-3.21.1-160000.1.1.aarch64"
}
}
],
"category": "architecture",
"name": "aarch64"
},
{
"branches": [
{
"category": "product_version",
"name": "helm-bash-completion-3.21.1-160000.1.1.noarch",
"product": {
"name": "helm-bash-completion-3.21.1-160000.1.1.noarch",
"product_id": "helm-bash-completion-3.21.1-160000.1.1.noarch"
}
}
],
"category": "architecture",
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{
"branches": [
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],
"category": "architecture",
"name": "ppc64le"
},
{
"branches": [
{
"category": "product_version",
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"product": {
"name": "helm-3.21.1-160000.1.1.x86_64",
"product_id": "helm-3.21.1-160000.1.1.x86_64"
}
}
],
"category": "architecture",
"name": "x86_64"
},
{
"branches": [
{
"category": "product_name",
"name": "SUSE Linux Micro 6.2",
"product": {
"name": "SUSE Linux Micro 6.2",
"product_id": "SUSE Linux Micro 6.2",
"product_identification_helper": {
"cpe": "cpe:/o:suse:sl-micro:6.2"
}
}
}
],
"category": "product_family",
"name": "SUSE Linux Enterprise"
}
],
"category": "vendor",
"name": "SUSE"
}
],
"relationships": [
{
"category": "default_component_of",
"full_product_name": {
"name": "helm-3.21.1-160000.1.1.aarch64 as component of SUSE Linux Micro 6.2",
"product_id": "SUSE Linux Micro 6.2:helm-3.21.1-160000.1.1.aarch64"
},
"product_reference": "helm-3.21.1-160000.1.1.aarch64",
"relates_to_product_reference": "SUSE Linux Micro 6.2"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "helm-3.21.1-160000.1.1.ppc64le as component of SUSE Linux Micro 6.2",
"product_id": "SUSE Linux Micro 6.2:helm-3.21.1-160000.1.1.ppc64le"
},
"product_reference": "helm-3.21.1-160000.1.1.ppc64le",
"relates_to_product_reference": "SUSE Linux Micro 6.2"
},
{
"category": "default_component_of",
"full_product_name": {
"name": "helm-3.21.1-160000.1.1.x86_64 as component of SUSE Linux Micro 6.2",
"product_id": "SUSE Linux Micro 6.2:helm-3.21.1-160000.1.1.x86_64"
},
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"relates_to_product_reference": "SUSE Linux Micro 6.2"
},
{
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},
"product_reference": "helm-bash-completion-3.21.1-160000.1.1.noarch",
"relates_to_product_reference": "SUSE Linux Micro 6.2"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-39821",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-39821"
}
],
"notes": [
{
"category": "general",
"text": "The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode(\"xn--example-.com\") incorrectly returns the name \"example.com\" rather than an error. This behavior can lead to privilege escalation in programs using the idna package. For example, a program which performs privilege checks on the ASCII hostname may reject \"example.com\" but permit \"xn--example-.com\". If that program subsequently converts the ASCII hostname to Unicode, it will inadvertently permits access to the Unicode name \"example.com\".",
"title": "CVE description"
}
],
"product_status": {
"recommended": [
"SUSE Linux Micro 6.2:helm-3.21.1-160000.1.1.aarch64",
"SUSE Linux Micro 6.2:helm-3.21.1-160000.1.1.ppc64le",
"SUSE Linux Micro 6.2:helm-3.21.1-160000.1.1.x86_64",
"SUSE Linux Micro 6.2:helm-bash-completion-3.21.1-160000.1.1.noarch"
]
},
"references": [
{
"category": "external",
"summary": "CVE-2026-39821",
"url": "https://www.suse.com/security/cve/CVE-2026-39821"
},
{
"category": "external",
"summary": "SUSE Bug 1266474 for CVE-2026-39821",
"url": "https://bugzilla.suse.com/1266474"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
"product_ids": [
"SUSE Linux Micro 6.2:helm-3.21.1-160000.1.1.aarch64",
"SUSE Linux Micro 6.2:helm-3.21.1-160000.1.1.ppc64le",
"SUSE Linux Micro 6.2:helm-3.21.1-160000.1.1.x86_64",
"SUSE Linux Micro 6.2:helm-bash-completion-3.21.1-160000.1.1.noarch"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.4,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"products": [
"SUSE Linux Micro 6.2:helm-3.21.1-160000.1.1.aarch64",
"SUSE Linux Micro 6.2:helm-3.21.1-160000.1.1.ppc64le",
"SUSE Linux Micro 6.2:helm-3.21.1-160000.1.1.x86_64",
"SUSE Linux Micro 6.2:helm-bash-completion-3.21.1-160000.1.1.noarch"
]
}
],
"threats": [
{
"category": "impact",
"date": "2026-06-21T00:45:47Z",
"details": "important"
}
],
"title": "CVE-2026-39821"
}
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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