GHSA-VMX8-MQV2-9GMG
Vulnerability from github – Published: 2026-04-10 15:32 – Updated: 2026-04-10 15:32Helm is a package manager for Charts for Kubernetes. In Helm versions >=4.0.0 and <=4.1.3, a specially crafted Helm plugin, when installed or updated, will cause Helm to write the contents of the plugin to an arbitrary filesystem location.
Impact
A Helm user who installs or updates a plugin that is specially crafted can cause Helm to attempt to write the content of the affected plugin to an arbitrary location on the user's filesystem. Impacted users risk potentially overwriting user and system files which may further compromise the integrity of a system.
Patches
This issue has been patched in Helm v4.1.4
Installing/updating a plugin with a non-SemVer version (which excludes path traversal patterns) will result in an error.
Workarounds
Validate that the plugin.yaml of the Helm plugin does not include a version: field containing POSIX dot-dot path separators ie. "/../".
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.1.3"
},
"package": {
"ecosystem": "Go",
"name": "helm.sh/helm/v4"
},
"ranges": [
{
"events": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.1.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-35204"
],
"database_specific": {
"cwe_ids": [
"CWE-22"
],
"github_reviewed": true,
"github_reviewed_at": "2026-04-10T15:32:56Z",
"nvd_published_at": "2026-04-09T16:16:27Z",
"severity": "HIGH"
},
"details": "Helm is a package manager for Charts for Kubernetes. In Helm versions \u003e=4.0.0 and \u003c=4.1.3, a specially crafted Helm plugin, when installed or updated, will cause Helm to write the contents of the plugin to an arbitrary filesystem location.\n\n### Impact\n\nA Helm user who installs or updates a plugin that is specially crafted can cause Helm to attempt to write the content of the affected plugin to an arbitrary location on the user\u0027s filesystem. Impacted users risk potentially overwriting user and system files which may further compromise the integrity of a system.\n\n### Patches\n\nThis issue has been patched in Helm v4.1.4\n\nInstalling/updating a plugin with a non-SemVer version (which excludes path traversal patterns) will result in an error.\n\n### Workarounds\n\nValidate that the `plugin.yaml` of the Helm plugin does not include a `version:` field containing POSIX dot-dot path separators ie. \"`/../`\".",
"id": "GHSA-vmx8-mqv2-9gmg",
"modified": "2026-04-10T15:32:56Z",
"published": "2026-04-10T15:32:56Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/helm/helm/security/advisories/GHSA-vmx8-mqv2-9gmg"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-35204"
},
{
"type": "WEB",
"url": "https://github.com/helm/helm/commit/36c8539e99bc42d7aef9b87d136254662d04f027"
},
{
"type": "PACKAGE",
"url": "https://github.com/helm/helm"
},
{
"type": "WEB",
"url": "https://github.com/helm/helm/releases/tag/v4.1.4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:L/SC:H/SI:H/SA:H",
"type": "CVSS_V4"
}
],
"summary": "Helm has a path traversal in plugin metadata version enables arbitrary file write outside Helm plugin directory"
}
Sightings
| Author | Source | Type | Date |
|---|
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.