Bootstrap End of Life (EOL) Dates & Support Timeline
Complete end-of-life dates, support windows, and security status for all Bootstrap versions. Data sourced from endoflife.date and official vendor documentation. Updated at every deploy.
✓Bootstrap 5.3.8 is actively supported. No versions approaching EOL in the next 6 months.
Latest Active
5.3.8
5 series
Next EOL
—
None upcoming
Active Versions
1
of 4 total
EOL Versions
3
no longer patched
Release Cycle Timeline
■ EOL
■ Warning
■ Active
┊ Today
All Versions
Version
Latest Release
Release Date
EOL Date
Days
Status
2
2.3.2
Jan 31, 2012
Aug 19, 2013
4646 days past EOL
EOL
3 LTS
3.4.1
Aug 19, 2013
Jul 24, 2019
2481 days past EOL
EOL
4 LTS
4.6.2
Jan 18, 2018
Jan 1, 2023
1224 days past EOL
EOL
5 LTS
5.3.8
May 5, 2021
Already EOL
Supported
Active
What does Bootstrap end of life mean for your organization?
When a Bootstrap version reaches end of life, the maintainers stop issuing security patches. Vulnerabilities discovered after this date are publicly disclosed on the National Vulnerability Database, exploit code appears on GitHub, and your systems remain permanently exposed.
The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the accumulation of unpatched vulnerabilities in EOL software. With a zero-day, nobody knows about the vulnerability. With EOL software, the vulnerability is public — listed, rated, and often weaponized — but no patch will ever exist. This is the most dangerous gap in enterprise security posture.
Organizations running EOL Bootstrap should treat it as a vulnerability class in their risk register, apply compensating controls (network segmentation, enhanced monitoring, access restriction), and prioritize migration to a supported version.
Check your full stack for EOL risk
Upload requirements.txt, package.json, or Gemfile — full EOL report instantly.
See the full table above for all Bootstrap version EOL dates.
What is the latest supported version of Bootstrap?
The latest active version of Bootstrap is 5.3.8. Always verify against the table above as support windows can change.
What happens when Bootstrap reaches end of life?
When Bootstrap reaches end of life, the vendor stops issuing security patches. Any CVEs disclosed after the EOL date accumulate indefinitely with no patch path — creating an ever-growing attack surface that most vulnerability scanners do not flag.
How do I check if I'm running an EOL version of Bootstrap?
Check your current version against the table above. If your version's EOL date has passed, you are running unsupported software. You can also use the endoflife.ai Stack Scanner to check your entire dependency file at once.
Is there extended support available for EOL Bootstrap versions?
Some vendors offer extended support for EOL software. Contact the original vendor or check with enterprise support providers for options.