EUVD-2026-21100
GHSA-hr2v-4r36-88hr
CVSS Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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Description
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.
Analysis
Helm versions 3.20.1 and earlier, and 4.1.3 and earlier, allow local attackers with user interaction to write Chart contents to arbitrary directories via path traversal in the helm pull --untar command. A specially crafted Chart will bypass the expected subdirectory naming convention and extract files to the current working directory or a user-specified destination, potentially overwriting existing files. …
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