Bug 2457151 (CVE-2026-35206)

Summary: CVE-2026-35206 github.com/helm/helm: Helm: Files written to unexpected directory via specially crafted Chart
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: alcohan, bdettelb, gparvin, jbalunas, mhess, pahickey, rhaigner, vle, vwilson
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in Helm, a package manager for Kubernetes. A remote attacker could exploit this vulnerability by providing a specially crafted Chart to the `helm pull --untar` command. This would cause the Chart's contents to be written to an unintended directory, potentially overwriting existing files or placing malicious files in an accessible location, leading to data integrity and availability issues.
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-04-09 22:05:59 UTC 
Helm is a package manager for Charts for Kubernetes. In Helm versions <=3.20.1 and <=4.1.3, a specially crafted Chart will cause helm pull --untar  [chart URL | repo/chartname] to write the Chart's contents to the immediate output directory (as defaulted to the current working directory; or as given by the --destination and --untardir flags), rather than the expected output directory suffixed by the chart's name. This vulnerability is fixed in 3.20.2 and 4.1.4.