From 138886fb485231d6f0fd7636a2d1e4ace5490f5a Mon Sep 17 00:00:00 2001 From: Eduardo Silva Date: Fri, 14 Aug 2026 15:32:55 -0600 Subject: [PATCH 1/2] maintenance: update v5.1 stable status Signed-off-by: Eduardo Silva --- MAINTENANCE.md | 53 +++++++++++++++++++++++++++++--------------------- README.md | 2 +- SECURITY.md | 10 ++++++---- 3 files changed, 38 insertions(+), 27 deletions(-) diff --git a/MAINTENANCE.md b/MAINTENANCE.md index 183d1372a3e..9dac718b3af 100644 --- a/MAINTENANCE.md +++ b/MAINTENANCE.md @@ -4,18 +4,19 @@ This document outlines the maintenance strategy and version support for Fluent B ## Active Branches and Maintainers -| Branch | Version | Status | Maintainer | Notes | -|------------|--------------------|---------------------|-------------------------------------------------------------|--------------------------------------------------------------------| -| `master` | v5.1 (development) | Active development | [Eduardo Silva](https://github.com/edsiper) | Next minor development line. All new features and bug fixes land here first | -| `5.0` | v5.0.x | Stable | [Eduardo Silva](https://github.com/edsiper) [Hiroshi Hatake (@cosmo0920)](https://github.com/cosmo0920) | Current stable release series. Receives bug fixes, security fixes, and selected low-risk backports. | -| `4.2` | v4.2.x | Maintenance only | [Eduardo Silva](https://github.com/edsiper) [Hiroshi Hatake (@cosmo0920)](https://github.com/cosmo0920) | Critical fixes and safe backports only. Maintained until **July 30, 2026** | -| `4.1` | v4.1.x | Maintenance only | [Hiroshi Hatake (@cosmo0920)](https://github.com/cosmo0920) | Critical fixes and safe backports only. Maintained until **February 28, 2026** | +| Branch | Version | Status | Maintainer | Notes | +|------------|---------|------------------|-------------------------------------------------------------|--------------------------------------------------------------------| +| `master` | v5.1.x | Stable | [Eduardo Silva](https://github.com/edsiper) | Current stable release series. All new features and bug fixes land here first. | +| `5.0` | v5.0.x | Maintenance only | [Eduardo Silva](https://github.com/edsiper) [Hiroshi Hatake (@cosmo0920)](https://github.com/cosmo0920) | Bug fixes, security fixes, and selected low-risk backports until **November 30, 2026**. | --- ## Maintenance Policy -Active development is currently on the next Fluent Bit **v5.1** line (tracked in the `master` branch). The **v5.0** branch is the current stable release series and receives stable branch updates. Previous release lines enter **maintenance mode** after the next major/minor release. +Fluent Bit **v5.1** is the current stable release series and is tracked in the +`master` branch. The **v5.0** branch is in maintenance mode and receives bug +fixes, security updates, and selected low-risk backports until its +End-of-Maintenance date. Older release lines are End-of-Life (EOL). ### Accepted Changes for Maintenance Branches @@ -27,21 +28,28 @@ Active development is currently on the next Fluent Bit **v5.1** line (tracked in Maintenance releases continue on an as-needed basis depending on urgency and impact. -### v5.0 Stable Series +### v5.1 Stable Series -**v5.0** is the current stable release series and receives bug fixes, security updates, and selected low-risk backports. This is the recommended version for production use. +**v5.1** is the current stable release series and is recommended for production +use. New features and bug fixes land in `master` first. -### v4.2 Maintenance +### v5.0 Maintenance -**v4.2** has entered **maintenance mode** and receives critical fixes and safe backports until **July 30, 2026** (as specified in [SECURITY.md](SECURITY.md)). +**v5.0** is in **maintenance mode** and receives bug fixes, security updates, +and selected low-risk backports until **November 30, 2026** (as specified in +[SECURITY.md](SECURITY.md)). -### v4.1 Maintenance +### v4.2 End-of-Life -**v4.1** has entered **maintenance mode**, now maintained by [Hiroshi Hatake (@cosmo0920)](https://github.com/cosmo0920), a long-time Fluent Bit contributor and core developer. +**v4.2** reached **End-of-Life (EOL)** on **July 30, 2026** and is no longer +maintained. -**v4.1** will receive security updates and critical fixes until **February 28, 2026** (as specified in [SECURITY.md](SECURITY.md)). +### v4.1 End-of-Life -### v4.0 Maintenance +**v4.1** reached **End-of-Life (EOL)** on **February 28, 2026** and is no longer +maintained. + +### v4.0 End-of-Life **v4.0** reached **End-of-Life (EOL)** on **December 23, 2025** and is no longer maintained. No further security patches or bug fixes will be provided for this version line. @@ -49,13 +57,14 @@ Maintenance releases continue on an as-needed basis depending on urgency and imp ## How to Contribute to Maintained Versions -If you're submitting a fix or feature relevant to a stable or maintenance branch (v5.0, v4.2, or v4.1): +If you're submitting a fix or feature relevant to a stable or maintenance +branch: - Open your PR against the `master` branch -- Add a note in the PR or issue: `Target: v5.0`, `Target: v4.2`, or `Target: v4.1` -- Tag the branch maintainer to request backport consideration: - - For v5.0: [@edsiper](https://github.com/edsiper) [@cosmo0920](https://github.com/cosmo0920) - - For v4.2: [@edsiper](https://github.com/edsiper) [@cosmo0920](https://github.com/cosmo0920) - - For v4.1: [@cosmo0920](https://github.com/cosmo0920) +- For a v5.0 backport, add `Target: v5.0` to the PR or issue and tag + [@edsiper](https://github.com/edsiper) or + [@cosmo0920](https://github.com/cosmo0920) -> **Note:** v4.0 is End-of-Life and no longer accepts backports. For security-related issues, please follow the process outlined in [SECURITY.md](SECURITY.md). +> **Note:** v4.2 and earlier are End-of-Life and no longer accept backports. For +> security-related issues, follow the process outlined in +> [SECURITY.md](SECURITY.md). diff --git a/README.md b/README.md index 4cbb189f390..7757cb5a949 100644 --- a/README.md +++ b/README.md @@ -26,7 +26,7 @@ Fluent Bit supports a wide array of platforms, including Linux, Windows, MacOS, ## πŸ“Œ Roadmap & Maintenance We follow a fast-paced development cycle, with major releases every 3–4 months. -The active development branch (`master`) is currently focused on **v5.1** (development). +The `master` branch currently tracks **v5.1**, the current stable release series. For version-specific maintenance timelines and policies, see our [MAINTENANCE.md](https://github.com/fluent/fluent-bit/blob/master/MAINTENANCE.md). diff --git a/SECURITY.md b/SECURITY.md index 3be3a6545b5..50b5f069531 100644 --- a/SECURITY.md +++ b/SECURITY.md @@ -6,14 +6,16 @@ Fluent Bit maintains active security support for a limited set of release lines. | Version | Status | Security Updates Until | |-----------|------------|------------------------| +| **5.1.x** | βœ… Active | To be announced | | **5.0.x** | βœ… Active | **November 30, 2026** | -| **4.2.x** | βœ… Active | **July 30, 2026** | +| **4.2.x** | ❌ EOL | **July 30, 2026** | | **4.1.x** | ❌ EOL | **February 28, 2026** | | **4.0.x** | ❌ EOL | **December 23, 2025** | | **3.2.x** | ❌ EOL | β€” | | **< 3.2** | ❌ EOL | β€” | -> **Note:** 4.1 and earlier are End-of-Life (EOL) and receive no further fixes. +> **Note:** 4.2 and earlier are End-of-Life (EOL) and receive no further fixes. +> The v5.1 End-of-Maintenance date will be published when it is finalized. --- @@ -22,7 +24,7 @@ Fluent Bit maintains active security support for a limited set of release lines. - We backport **critical** and **high-severity** security fixes to all **Active** branches listed above. - Medium/low-severity fixes may be backported at the maintainers’ discretion. - After a branch reaches **EOM**, no further patches are published for that line. -- Users are strongly encouraged to keep current with the latest **4.x** release line. +- Users are strongly encouraged to use the latest **5.1.x** release. --- @@ -59,4 +61,4 @@ For third-party CVEs that may impact Fluent Bit, we will post an assessment and --- -_Last updated: December 18, 2025_ +_Last updated: August 14, 2026_ From 9cb00a99bae8aa49486d286b4996a78c3ad6b499 Mon Sep 17 00:00:00 2001 From: Eduardo Silva Date: Fri, 14 Aug 2026 15:44:20 -0600 Subject: [PATCH 2/2] maintenance: clarify v5.0 accepted fixes Signed-off-by: Eduardo Silva --- MAINTENANCE.md | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/MAINTENANCE.md b/MAINTENANCE.md index 9dac718b3af..0d370f5b654 100644 --- a/MAINTENANCE.md +++ b/MAINTENANCE.md @@ -7,7 +7,7 @@ This document outlines the maintenance strategy and version support for Fluent B | Branch | Version | Status | Maintainer | Notes | |------------|---------|------------------|-------------------------------------------------------------|--------------------------------------------------------------------| | `master` | v5.1.x | Stable | [Eduardo Silva](https://github.com/edsiper) | Current stable release series. All new features and bug fixes land here first. | -| `5.0` | v5.0.x | Maintenance only | [Eduardo Silva](https://github.com/edsiper) [Hiroshi Hatake (@cosmo0920)](https://github.com/cosmo0920) | Bug fixes, security fixes, and selected low-risk backports until **November 30, 2026**. | +| `5.0` | v5.0.x | Maintenance only | [Eduardo Silva](https://github.com/edsiper) [Hiroshi Hatake (@cosmo0920)](https://github.com/cosmo0920) | Critical bug fixes, security fixes, and selected low-risk backports until **November 30, 2026**. | --- @@ -35,9 +35,9 @@ use. New features and bug fixes land in `master` first. ### v5.0 Maintenance -**v5.0** is in **maintenance mode** and receives bug fixes, security updates, -and selected low-risk backports until **November 30, 2026** (as specified in -[SECURITY.md](SECURITY.md)). +**v5.0** is in **maintenance mode** and receives critical bug fixes, security +updates, and selected low-risk backports until **November 30, 2026** (as +specified in [SECURITY.md](SECURITY.md)). ### v4.2 End-of-Life