# Helm v4.2.0 — Release & Upgrade Intelligence
- **Product:** Helm (https://helm.sh)
- **Version:** v4.2.0
- **Released:** May 14, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/helm/updates/v4.2.0/

## Executive Summary (TL;DR)
Helm v4.2.0. Source highlight: Helm v4.2.0 is a feature release. Users are encouraged to upgrade for the best experience.

## New Features
- Add `mustToToml` template function
- 4.3.0 is the next feature release
- ci: add fetch-depth 0 to canary checkout for goreleaser 82899404a68f3826389bb38cf67bf75085db6b2c (Terry Howe)
- add support for loong64 45336ccd5b2621357e3f785c1fe93627c5990a6e (Terry Howe)
- test(values): Add test for nil cleanup in partially overridden subchart maps 52fc971da37cf34aa26e7d7c460f2430dfb01b26 (Johannes Lohmer)
- test(values): add test for subchart nil producing %!s(<nil>) 6eb4ebf0e1afb0c63d748bf116145a5b9e0842b7 (Johannes Lohmer)

## Improvements
- chore: enable perfsprint linter 62494896e9a105b63df2c76c638c53304a37121e (Matthieu MOREL)
- chore(internal): enable perfsprint linter (#31871) d4f6193a7ec7ae9ea479da3372eeaf22b445ebcc (Matthieu MOREL)
- chore(pkg): enable perfsprint linter e3c74fd9fae52c85899ee0ca9a0c1422d59e2bc2 (Matthieu MOREL)
- chore(pkg): enable perfsprint linter 1d2d63cc4330fcac786e70926f805b69c0b49ca2 (Matthieu MOREL)
- chore(pkg): enable perfsprint linter 63f03c0f5c41b53de3d432b446da9430da99f5bd (Matthieu MOREL)
- chore(pkg): enable perfsprint linter c25c988cfb7bbe3b139dec39cad1db4be33b13c6 (Matthieu MOREL)

## Bug Fixes
- for discussing PRs, code, and bugs
- Test, debug, and contribute charts: ArtifactHub/packages
- 4.2.1 will contain only bug fixes
- fix: add -extldflags -static to dist target to match build-cross f60ab7c31c81a73b8e0aade5aff41bfc01c08820 (Terry Howe)
- fix: address goreleaser build issues flagged in review c075022ce16489f5f7afd45a37b679cf58fa36ea (Terry Howe)
- fix: pass VERSION as GORELEASER_CURRENT_TAG to preserve v-prefix in archive names 04885dd905b6f8a823733dbc9b9f5cb2843a975f (Terry Howe)