Boundary 0.21 · Version Status
Boundary 0.21 End of Life Date
Boundary 0.21 end-of-life date, support status, and CVE risk. Data from endoflife.date and official vendor documentation.
✓
Boundary 0.21 is actively supported. EOL date: Already EOL.
EOL Date
Already EOL
Supported
Latest Release
0.21.3
Standard release
Release Date
Dec 11, 2025
Boundary 0.21 series
| Version | Latest | EOL Date | Status |
|---|
| 0.16 |
0.16.3 |
Feb 10, 2025 |
EOL |
| 0.17 |
0.17.2 |
Sep 25, 2025 |
EOL |
| 0.18 |
0.18.2 |
Dec 11, 2025 |
EOL |
| 0.19 |
0.19.5 |
EOL |
Active |
| 0.20 |
0.20.3 |
EOL |
Active |
| → 0.21 |
0.21.3 |
EOL |
Active |
What does Boundary 0.21 end of life mean?
When Boundary 0.21 reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.
The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Running Boundary 0.21 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to Boundary 0.21 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Boundary 0.21 reach end of life?
Boundary 0.21 has already reached end of life.
Is Boundary 0.21 still supported?
Yes, Boundary 0.21 is currently supported. The EOL date is Already EOL.
What should I upgrade to from Boundary 0.21?
The recommended upgrade from Boundary 0.21 is
Boundary 0.21 — the latest actively supported version. Check the
Boundary full timeline for all supported versions.
What are the security risks of running Boundary 0.21 past EOL?
When Boundary 0.21 reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no remediation path. Most vulnerability scanners do not flag this — it is the CVE blind spot. Organizations running EOL Boundary should migrate immediately or implement compensating controls.