How severe is CVE-2026-35204?

CVE-2026-35204 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-35204 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35204?

CVE-2026-35204 affects Helm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35204?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-35204 have an EU (EUVD) identifier?

Yes. CVE-2026-35204 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20900.

When was CVE-2026-35204 published?

CVE-2026-35204 was published on 2026-04-09 and last updated on 2026-06-30.

CVE-2026-35204

CVE-2026-35204 is a high-severity vulnerability in Helm with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 8.6)
CVSS v4: 8.4
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20900
Weakness: CWE-22
Affected product: Helm
Published: 2026-04-09
Last modified: 2026-06-30

Description

Helm is a package manager for Charts for Kubernetes. From 4.0.0 to 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. To prevent this, validate that the plugin.yaml of the Helm plugin does not include a version: field containing POSIX dot-dot path separators ie. "/../". This vulnerability is fixed in 4.1.4.

Frequently asked questions

What is CVE-2026-35204?: Helm is a package manager for Charts for Kubernetes. From 4.0.0 to 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. To prevent this, validate that the plugin.yaml of the Helm plugin does not include a version: field containing POSIX dot-dot path separators ie. "/../". This vulnerability is fixed in 4.1.4.
How severe is CVE-2026-35204?: CVE-2026-35204 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-35204 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35204?: CVE-2026-35204 affects Helm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35204?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-35204 have an EU (EUVD) identifier?: Yes. CVE-2026-35204 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20900.
When was CVE-2026-35204 published?: CVE-2026-35204 was published on 2026-04-09 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:helm:helm:*:*:*:*:*:*:*:*

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