# SABnzbd 5.1.2 — SABnzbd 5.1.2

- Product: SABnzbd (https://whatsnew.fyi/product/sabnzbd)
- Vendor: SABnzbd
- Date: 2026-08-25
- Version: 5.1.2
- Original notes: https://github.com/sabnzbd/sabnzbd/releases/tag/5.1.2
- Permalink: https://whatsnew.fyi/product/sabnzbd/releases/5.1.2

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'.

---

- **security** — Resolved critical remote code execution vulnerability that allowed attackers reaching the web interface to bypass authentication on configuration endpoints and execute arbitrary commands
- **security** — Resolved high-severity path traversal vulnerability where maliciously crafted PAR2 or SFV files could cause content to be moved outside the job's folder during post-processing
- **security** — Resolved critical authentication vulnerability that allowed attackers to obtain valid sessions even when protected with username and password
- **fixed** — RSS filters were not applied directly
- **fixed** — Styling cache issues could occur after updating
- **fixed** — RSS items were removed too eagerly from RSS-history after download
- **fixed** — The RSS-feed Clear Downloaded button did not do anything
- **added** — Refreshed the interface
- **changed** — When retrying a job, only the actually missing articles are tried again instead of re-downloading all files with missing data
- **changed** — RSS items are now stored in the database instead of on disk
- **added** — New RSS Age rule to filter jobs based on their age
- **added** — Downloaded RSS items are cleared from the RSS database after 3 days
- **added** — Added support for filename and path pattern matching to the Cleanup List
- **changed** — Unwanted extensions will also be removed after unpacking
- **added** — Allow job setting changes directly from Extra queue columns
- **added** — Added support for unpacking .tar files during post-processing
- **changed** — Improved anonymization of the logs when using Show Logging
- **added** — Added SAB_FILES environment variable to Post-processing scripts listing all files that resulted from the job
- **changed** — New Servers will default to 16 connections instead of 8

Release Notes - SABnzbd 5.1.2
=========================================================

SABnzbd 5.1.1 and 5.1.2 resolved 3 serious vulnerabilities.

##### Critical remote code execution vulnerability resolved in 5.1.2 (GHSA-rgqj-28c2-gxwp)

You are only affected if an untrusted party can reach the web interface.
By default, SABnzbd is only accessible from your own device and `External internet access`
is set to `No access`. If either of those is still at its default, or if you use a proxy
service for authentication, you are not affected.

In version 5.1.1 and earlier, an attacker who can reach the web interface could bypass
authentication on configuration endpoints, even when SABnzbd is protected with a username
and password. By changing SABnzbd's settings this way, an attacker could ultimately execute
arbitrary commands on the system running SABnzbd, with the same permissions as SABnzbd itself.
This also means that all information in SABnzbd would be exposed.

See GHSA-xrfq-jhgh-wqch below for actions and mitigations.
More information: https://sabnzbd.org/5-1-vulnerabilities

##### High-severity path traversal vulnerability resolved in 5.1.2 (GHSA-75g3-96fr-7p2r)

You are affected if SABnzbd processes NZBs or downloads from a source you do not fully
trust, such as a public indexer.

In version 5.1.1 and earlier, a maliciously crafted PAR2 or SFV file inside a download
could cause SABnzbd to move downloaded content outside of the job's own folder during
post-processing. By using this to plant a file in another job's internal administration,
an attacker could ultimately execute arbitrary commands on the system running SABnzbd,
with the same permissions as SABnzbd itself.

The only mitigation is to update, there is no configuration change that prevents this.
More information: https://sabnzbd.org/5-1-vulnerabilities

##### Critical authentication vulnerability resolved in 5.1.1 (GHSA-xrfq-jhgh-wqch)

You are only affected if an untrusted party can reach the web interface.
By default, SABnzbd is only accessible from your own device and `External internet access`
is set to `No access`. If either of those is still at its default, or if you use a proxy
service for authentication, you are not affected.

If the SABnzbd login page is reachable from outside your network, an attacker could
obtain a valid session in version 5.1.0 and earlier, even when SABnzbd is protected with
a username and password. This means that all information in SABnzbd would be exposed.

If you rely on the SABnzbd username and password to keep out other users on your
network or the internet, it is recommended that you change the following
sensitive information after applying the update:

* SABnzbd username and password.
* SABnzbd API-key.
* Usenet server passwords.
* API-keys from indexers used within RSS-feeds.
* Authentication information for notification services.

If you cannot update right away, the only mitigations are to ensure the web interface is not
reachable by untrusted parties, or to lower `External internet access` to `Full API` or below.

More information: https://sabnzbd.org/5-1-vulnerabilities

##### Other bug fixes in 5.1.2

* RSS filters were not applied directly.

##### Other bug fixes in 5.1.1

* Styling cache issues could occur after updating.
* RSS items were removed too eagerly from RSS-history after download.
* The RSS-feed `Clear Downloaded` button did not do anything.

##### Changelog 5.1.0

This release brings a fundamental improvement to "Retry": instead of
re-downloading any files with missing data, only the articles that were actually
missing are fetched again. RSS got an overhaul under the hood, the interface is
refreshed, and we added quite a long list of long-requested features and bugfixes.

##### New features in 5.1.0

* Refreshed the interface.
* When Retrying a job, only the actually missing articles are tried again.
  This only works for jobs downloaded in 5.1.0 (or newer).
* RSS items are now stored in the database instead

_[Truncated at 4000 characters — full notes: https://github.com/sabnzbd/sabnzbd/releases/tag/5.1.2]_