Fluent Bit end of life: end of support by version
CNCF · Monitoring & ITSM
For Fluent Bit by CNCF, patchletter knows 12 support cycles. 11 of them have already ended and receive no more security updates. The current version of Fluent Bit is 5.1.5. The cycles come from the open endoflife.date project, last reconciled on 07/11/2026.
When does support end for which Fluent Bit version?
A cycle is a maintained version line. Where a date is given, support ends on that day. After it the vendor ships no more security updates for that line.
| Cycle | Latest version | End of support | Status |
|---|---|---|---|
| 5.1 | 5.1.5 | no date on record | supported |
| 5.0 | 5.0.11 | 2 days ago | End of Life |
| 4.2 | 4.2.8 | 131 days ago | End of Life |
| 4.1 | 4.1.2 | 270 days ago | End of Life |
| 4.0 | 4.0.14 | 319 days ago | End of Life |
| 3.2 | 3.2.10 | 497 days ago | End of Life |
| 3.1 | 3.1.10 | 634 days ago | End of Life |
| 3.0 | 3.0.7 | 761 days ago | End of Life |
| 2.2 | 2.2.3 | 870 days ago | End of Life |
| 2.1 | 2.1.10 | 1006 days ago | End of Life |
| 2.0 | 2.0.14 | 1208 days ago | End of Life |
| 1.9 | 1.9.10 | 1434 days ago | End of Life |
Which Fluent Bit versions no longer receive security updates?
11 of 12 cycles have ended. If you run one of those lines, the vendor ships you no more patches, not even for critical flaws.
- Fluent Bit 5.05.0.11
- Fluent Bit 4.24.2.8
- Fluent Bit 4.14.1.2
- Fluent Bit 4.04.0.14
- Fluent Bit 3.23.2.10
- Fluent Bit 3.13.1.10
- Fluent Bit 3.03.0.7
- Fluent Bit 2.22.2.3
- Fluent Bit 2.12.1.10
- Fluent Bit 2.02.0.14
- Fluent Bit 1.91.9.10
Where does the EOL data for Fluent Bit come from?
From the open endoflife.date project, which collects vendors' official support commitments. patchletter reconciles the cycles daily; the Fluent Bit data is as of 07/11/2026. In case of doubt the vendor's own lifecycle page applies. patchletter deliberately stores no vendor full texts.
New Fluent Bit versions by email
Tick the product and patchletter reports new releases by email. The update email costs nothing, and one click stops it again. The warning 90, 30 and 7 days before support ends is part of patchletter Pro.