# SABnzbd 5.0.4RC1 — SABnzbd 5.0.4RC1

- Product: SABnzbd (https://whatsnew.fyi/product/sabnzbd)
- Vendor: SABnzbd
- Date: 2026-06-07
- Version: 5.0.4RC1
- Original notes: https://github.com/sabnzbd/sabnzbd/releases/tag/5.0.4RC1
- Permalink: https://whatsnew.fyi/product/sabnzbd/releases/5.0.4rc1
- Labels: Pre-release

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **changed** — RSS feed modifications no longer require clicking Apply Filters
- **fixed** — Fixed RSS priority handling
- **fixed** — Server Test could block the queue
- **changed** — Use reduced progress bar width in Compact layout
- **fixed** — Replaced unreliable directory access check
- **fixed** — Prevent crash in idle-jobs check
- **fixed** — Jobs with invalid date would show as Fetching
- **changed** — Windows and macOS: Updated Python to 3.14.5 and Unrar to 7.22
- **fixed** — Fetching NZB's failed on new installations
- **fixed** — Queue entries from older versions now load correctly after upgrading
- **changed** — nzo_id now uses GUIDs to prevent duplicates
- **fixed** — Updating to 5.0 now succeeds even when duplicate nzo_id values exist
- **fixed** — URL fetching no longer crashes when duplicate jobs are present
- **fixed** — Default RSS priority is now applied correctly
- **fixed** — Duplicate filenames no longer cause queue stalls
- **fixed** — IPv6 binding now works correctly for the Web interface
- **fixed** — The On queue finish action now executes reliably
- **fixed** — Saving the post-processing queue no longer throws errors
- **fixed** — Directory creation now handles existing directories gracefully
- **added** — Added support for NNTP Pipelining which eliminates idle waiting between requests, significantly improving speeds on high-latency connections

Release Notes - SABnzbd 5.0.4 Release Candidate 1
=========================================================

In this fifth major release of SABnzbd, we included:

* Smarter (and potentially faster) downloads with NNTP Pipelining and Direct Write.
* Reliability gains from a reworked cache and safer processing.
* A significant number of bug fixes and platform updates.

##### Features and bug fixes in 5.0.4

* RSS feed modifications no longe require clicking `Apply Filters`.
* Fixed RSS priority handling.
* Server Test could block the queue.
* Use reduced progress bar width in Compact layout.
* Replaced unreliable directory access check.
* Prevent crash in idle-jobs check.
* Jobs with invalid date would show as `Fetching`.
* Windows and macOS: Updated Python to 3.14.5 and Unrar to 7.22.

##### Features and bug fixes in 5.0.1, 5.0.2 and 5.0.3

* Fetching NZB's failed on new installations.
* Queue entries from older versions now load correctly after upgrading.
* `nzo_id` now uses GUIDs to prevent duplicates.
* Updating to 5.0 now succeeds even when duplicate `nzo_id` values exist.
* URL fetching no longer crashes when duplicate jobs are present.
* Default RSS priority is now applied correctly.
* Duplicate filenames no longer cause queue stalls.
* IPv6 binding now works correctly for the Web interface.
* The `On queue finish` action now executes reliably.
* Saving the post-processing queue no longer throws errors.
* Directory creation now handles existing directories gracefully.
* Windows and macOS: Updated Unrar to 7.21 and 7zip to 26.01.

##### New features in 5.0.0

* Added support for NNTP Pipelining which eliminates idle waiting between
  requests, significantly improving speeds on high-latency connections.
  Read more here: https://sabnzbd.org/wiki/advanced/nntp-pipelining
  New servers will have `Articles per request` set to `2` by default.
  Existing servers need to be manually changed to use NNTP Pipelining.
* Implemented Direct Write to optimize assembly of downloaded files.
  Read more here: https://sabnzbd.org/wiki/advanced/direct-write
* Post-processing scripts will always be executed, even for failed jobs.
  Make sure to check the status of the job in your scripts!
* Removed Special setting `empty_postproc` as it is no longer needed.
* Complete redesign of article cache.
* Improved disk speed measurement in Status window.
* Reduced delays between jobs during post-processing.
* Improved handling of disks getting full.
* Diskspace check will now include Category-specific folders.
* If a download only contains `.nzb` files, the new downloads
  will include the name of the original download.
* No longer show tracebacks in the browser, only in the logs.
* Dropped support for Python 3.8.
* Windows: Added Windows ARM (portable) release.
* Windows and macOS: Added HTML version of the Release Notes.
* Windows and macOS: Updated Python to 3.14.4, Unrar to 7.20,
  par2cmdline-turbo to 1.4 and 7zip to 26.00.

##### Bug fixes in 5.0.0

* `Check before download` could get stuck or fail to reject.
* Several stability changes for the core download process.
* If only par2 files were missing, jobs could get incorrectly aborted.
* No error was shown in case NZB upload failed.
* Correct mobile layout if `Full Width` is enabled.
* Handle passwords that exceed Unrar's password limit.
* Aborted Direct Unpack could result in no files being unpacked.
* Encrypted RAR detection could sometimes fail.
* Unwanted extension check was unreliable on passworded downloads.
* No longer exclusively lock all directory operations.
* Improved handling of non-NFC unicode filenames.
* Sorting of files inside jobs was inconsistent.
* Linux: No longer break test-data in the release package.
* Windows: Tray icon disappears after Explorer restart.
* macOS: Slow to start on some network setups.

##### Changes to default settings for new installations in 5.0.0

* Default `Minimum Free Space for Temporary Download Folder` set to `500M`.
* Enabled `verify_xff_header`

_[Truncated at 4000 characters — full notes: https://github.com/sabnzbd/sabnzbd/releases/tag/5.0.4RC1]_