Bun Support Lifecycle & End-of-Life Schedule
Official release schedule, active LTS windows, and deprecation dates for Bun. Avoid running unsupported versions in production.
Bun Lifecycle Policy Summary
Incredibly fast JavaScript & TypeScript all-in-one runtime, bundler, test runner, and package manager.
Branch Support Matrix & EOL Cutoffs
| Branch / Cycle | Status | Release Date | End of Life (EOL) | Latest Patch | Upgrade Recommendation |
|---|---|---|---|---|---|
| v1.x LTS | 🟢 Active Support | 2023-09-08 | 2026-09-08 | 1.2.4 | ✓ Supported for production |
Why Upgrading from EOL Versions is Critical
Once an open-source branch reaches End-of-Life, upstream maintainers no longer backport patches for Common Vulnerabilities and Exposures (CVEs). Automated botnets routinely scan for publicly known exploits on unsupported runtime versions.