# Audiobookshelf v2.33.0

- Product: Audiobookshelf (https://whatsnew.fyi/product/audiobookshelf)
- Vendor: advplyr
- Date: 2026-03-12
- Version: v2.33.0
- Original notes: https://github.com/advplyr/audiobookshelf/releases/tag/v2.33.0
- Permalink: https://whatsnew.fyi/product/audiobookshelf/releases/v2.33.0

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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- **added** — Slovak language option
- **added** — Belarusian language option
- **added** — Database indexes for discover query performance
- **security** — Fix IDOR vulnerabilities in listening sessions, media progress, and bookmark endpoints
- **fixed** — Server crash filtering by decade with collapsed series
- **fixed** — Server crash on /me/progress/:libraryItemId/:episodeId? when episodeId is not passed in for a podcast library item
- **fixed** — Updating author name merging with same name authors in a different library
- **fixed** — Home page check current user from socket event when updating hide from continue listening
- **fixed** — Match tab click to use current value incorrect title attribute
- **fixed** — Aria-label for jump backward button
- **changed** — Improved personalized shelves performance by parallelizing shelf queries and reducing search payload size
- **changed** — Improved API cache invalidation for high-churn models such as sessions and media progress
- **changed** — Improved subtitle parsing to account for bare colon in title
- **changed** — Sanitize session DeviceInfo clientDeviceInfo fields
- **changed** — Sanitize server settings authLoginCustomMessage on save and load
- **changed** — Display localized and styled text for selected filter

###### Important: New authentication system was added in [v2.26.0](https://github.com/advplyr/audiobookshelf/releases/tag/v2.26.0). See https://github.com/advplyr/audiobookshelf/discussions/4460 for details.

###### Added

- Slovak language option by @belpe in #5077
- Belarusian language option by @pavel-miniutka in #5071
- Database indexes for discover query performance by @kevingatera in #5073

###### Fixed

- IDOR vulnerabilities in listening sessions, media progress, and bookmark endpoints #5062 by @mandreko in #5063
- Server crash filtering by decade with collapsed series
- Server crash on `/me/progress/:libraryItemId/:episodeId?` when episodeId is not passed in for a podcast library item #5058
- Updating author name merging with same name authors in a different library #4628
- Home page check current user from socket event when updating hide from continue listening
- UI/UX: Match tab "click to use current value" incorrect title attribute
- UI/UX: Aria-label for jump backward button by @KiwiHour in #4973

###### Changed

- Improved personalized shelves performance by parallelizing shelf queries and reducing search payload size by @kevingatera in #5073
- Improved API cache invalidation for high-churn models (sessions, media progress) by @kevingatera in #5073
- Improved subtitle parsing to account for bare colon in title by @kctdfh in #5036
- Sanitize session DeviceInfo `clientDeviceInfo` fields
- Sanitize server settings `authLoginCustomMessage` on save and load
- Fix OpenAPI spec description by @openam in #5042
- UI/UX: Display localized/styled text for selected filter by @sir-wilhelm in #4952
- More strings translated
  - Belarusian by @pavel-miniutka
  - Catalan by @enboig
  - Chinese (Simplified Han script) by @FiendFEARing
  - Czech by @Plazec
  - Danish by @xxzp3
  - French by @dapitch666
  - German by @ShaikaJar @Maxklos @B0rax
  - Greek by @lambolighting
  - Hebrew by @enosh
  - Hungarian by @Kabika82 @ugyes
  - Japanese by @litoma
  - Lithuanian by @mantas3
  - Norwegian Bokmål by @Torstein-Eide @soteland
  - Polish by @Jarsey45
  - Portuguese (Brazil) by @lribeiro
  - Romanian by @hac3ru
  - Slovak by @goozi12345 @pecer
  - Slovenian by @thehijacker
  - Swedish by @Cotignac @karlbe

##### New Contributors
* @KiwiHour made their first contribution in https://github.com/advplyr/audiobookshelf/pull/4973
* @openam made their first contribution in https://github.com/advplyr/audiobookshelf/pull/5042
* @belpe made their first contribution in https://github.com/advplyr/audiobookshelf/pull/5077
* @pavel-miniutka made their first contribution in https://github.com/advplyr/audiobookshelf/pull/5071
* @kctdfh made their first contribution in https://github.com/advplyr/audiobookshelf/pull/5036
* @mandreko made their first contribution in https://github.com/advplyr/audiobookshelf/pull/5063
* @kevingatera made their first contribution in https://github.com/advplyr/audiobookshelf/pull/5073

**Full Changelog**: https://github.com/advplyr/audiobookshelf/compare/v2.32.1...v2.33.0