Arbitrary Code Injection Affecting github.com/helm/helm/pkg/downloader package, versions <3.18.4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-GOLANG-GITHUBCOMHELMHELMPKGDOWNLOADER-10664612
- published10 Jul 2025
- disclosed8 Jul 2025
- creditJakub Ciolek
Introduced: 8 Jul 2025
CVE-2025-53547 Â (opens in a new tab)How to fix?
Upgrade github.com/helm/helm/pkg/downloader to version 3.18.4 or higher.
Overview
github.com/helm/helm/pkg/downloader is a Package downloader provides a library for downloading charts.
Affected versions of this package are vulnerable to Arbitrary Code Injection via the writeLock function. An attacker can execute arbitrary code by supplying crafted chart templates containing code in fields of Chart.yaml that will be carried over to a Chart.lock file. In case the Chart.lock file is linked to a file that can be executed (e.g., bash.rc or shell script) when dependencies are updated, this will result in unwanted code execution.
Note: This affects the Helm SDK when the downloader Manager performs an update; While helm dependency build can write a lock file when one does not exist successful exploitation requires a symlinked lock file to already exist.