Go 1.21 End of Life
Support dates, vulnerabilities published since end of life, and upgrade guidance — rebuilt from live data.
Go 1.21 reached end of life on 13 Aug 2024. It no longer receives security fixes.
Support timeline
Official dates from the Go release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 8 Aug 2023 | — |
| End of life | 13 Aug 2024 | 2.0 years ago |
| Latest release | 1.21.13 · 6 Aug 2024 | final |
The cost of staying: CVEs since end of life
51 Go vulnerabilities have been published since 13 Aug 2024. All were fixed in supported branches — 1.21 received none of them. Source: NVD.
Go CVEs published since 1.21's EOL, by year
3 of the 51 are rated critical · data refreshed 2026-08-09
Published 5 Feb 2026 · rated critical — fixed in supported branches only, never in 1.21. Details
Published 8 Apr 2026 · rated critical — fixed in supported branches only, never in 1.21. Details
Published 9 Feb 2026 · rated critical — fixed in supported branches only, never in 1.21. Details
Where to go from 1.21
Recommended target: Go 1.26.
The newest actively supported branch is Go 1.26 (latest release 1.26.5). Review go.dev before upgrading.
Frequently asked questions
Is Go 1.21 still safe to use?
No. Go 1.21 stopped receiving security fixes on 13 Aug 2024. Since then, 51 Go vulnerabilities have been published and fixed in supported branches — Go 1.21 received none of those fixes.
Can I still download Go 1.21?
Yes — the final release (1.21.13) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Go 1.21 to?
Upgrade to Go 1.26, the newest actively supported branch.