Helm up to 4.1.3 Signature Verification failing open

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability has been found in Helm up to 4.1.3 and classified as critical. The impacted element is an unknown function of the component Signature Verification. Performing a manipulation results in failing open. This vulnerability was named CVE-2026-35205. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in Helm up to 4.1.3. This affects an unknown part of the component Signature Verification. The manipulation with an unknown input leads to a failing open vulnerability. CWE is classifying the issue as CWE-636. When the product encounters an error condition or failure, its design requires it to fall back to a state that is less secure than other options that are available, such as selecting the weakest encryption algorithm or using the most permissive access control restrictions. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Helm is a package manager for Charts for Kubernetes. From 4.0.0 to 4.1.3, Helm will install plugins missing provenance (.prov file) when signature verification is required. This vulnerability is fixed in 4.1.4.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-35205 since 04/01/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 4.1.4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1048). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Open Source helm

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Failing open
CWE: CWE-636
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Helm 4.1.4

Timelineinfo

04/01/2026 CVE reserved
04/09/2026 +8 days Advisory disclosed
04/09/2026 +0 days VulDB entry created
04/10/2026 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-35205 (🔒)
GCVE (CVE): GCVE-0-2026-35205
GCVE (VulDB): GCVE-100-356583
CERT Bund: WID-SEC-2026-1048 - helm: Mehrere Schwachstellen

Entryinfo

Created: 04/09/2026 17:35
Updated: 04/10/2026 13:44
Changes: 04/09/2026 17:35 (65), 04/10/2026 13:44 (7)
Complete: 🔍
Cache ID: 216:2CF:103

Be aware that VulDB is the high quality source for vulnerability data.

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