calibre 9.4
Feb. 27th, 2026 08:00 amNew Features
- E-book viewer: Add "reading stats" to show reading progress
- Edit book: Nicer UI for changing the entries in the insert tag menu
- Cover grid: Option to draw emblems on top of cover in Preferences->Look & feel->Cover grid->Emblems
- Cover grid: Add option to draw text flush with bottom of rendered cover
Bug Fixes
- DOCX Input: Fix paragraph/list margins in documents created by LibreOffice that do not have Word 2007 compatibility
- ODT Input: Fix a regression in the previous release that broke conversion of images
- Content server: When banning IPs for repeated login is enabled, only use the IP address not any HTTP headers as the ban key (CVE-2026-27824)
- Content server: Sanitize content disposition received as query parameter (CVE-2026-27810)
calibre 9.3.1
Feb. 20th, 2026 08:00 amNew Features
- Windows installer: Detect running calibre processes and ask user to shutdown calibre before proceeding with installation to avoid reboots post installation
- Improve Preferences->Tweaks getting rid of the need for double apply
- KEPUB Output: When converting to KEPUB preserve cover aspect ratio regardless of the setting for it in the EPUB Output to match the behavior of KEPUB files from Kobo
Bug Fixes
- Make the new pages column value available in save to disk/send to device templates
- Hanvon N10 device driver: Fix calibre unable to put its metadata files onto the device
- Amazon metadata download plugin: Fix incorrect series index from amazon.com
- Fix a regression in calibre 9.0 that broke output to PDB/TCR/zTXT files
- Windows: Fix calibre not exiting on quit when the wireless device driver is used in calibre 9
- Fix error in page counting when using the calibredb command to add a book
- Completion: When sorting completion matches in contains mode ensure matches are sorted first by distance from beginning and then sub-sorted alphabetically
- Windows: Fix a regression in calibre 9 that caused tooltips to not follow the color scheme
- PDF Input: Fix PDF Outline not being converted to Table of Contents in output document when using the calibre engine
- ODT Input: Ensure images are extracted within container (CVE-2026-26064)
- PDB Input: Ensure extracted images are within the container (CVE-2026-26065)
- Fix a regression in calibre 9.0 that caused a spurious large books merge warning when merging books in the cover grid view
- Windows: Fix harmless error popup if user tries to launch calibre multiple times in quick succession
- Version 9.3.1 fixes a regression in the previous release that caused a spurious error message to show when merging books and a regression in calibre 9.0 that broke using textures as the Cover grid background when using the system theme on Windows
calibre 9.3
Feb. 20th, 2026 08:00 amNew Features
- Windows installer: Detect running calibre processes and ask user to shutdown calibre before proceeding with installation to avoid reboots post installation
- Improve Preferences->Tweaks getting rid of the need for double apply
- KEPUB Output: When converting to KEPUB preserve cover aspect ratio regardless of the setting for it in the EPUB Output to match the behavior of KEPUB files from Kobo
Bug Fixes
- Make the new pages column value available in save to disk/send to device templates
- Hanvon N10 device driver: Fix calibre unable to put its metadata files onto the device
- Amazon metadata download plugin: Fix incorrect series index from amazon.com
- Fix a regression in calibre 9.0 that broke output to PDB/TCR/zTXT files
- Windows: Fix calibre not exiting on quit when the wireless device driver is used in calibre 9
- Fix error in page counting when using the calibredb command to add a book
- Completion: When sorting completion matches in contains mode ensure matches are sorted first by distance from beginning and then sub-sorted alphabetically
- Windows: Fix a regression in calibre 9 that caused tooltips to not follow the color scheme
- PDF Input: Fix PDF Outline not being converted to Table of Contents in output document when using the calibre engine
- ODT Input: Ensure images are extracted within container (CVE-2026-26064)
- PDB Input: Ensure extracted images are within the container (CVE-2026-26065)
- Fix a regression in calibre 9.0 that caused a spurious large books merge warning when merging books in the cover grid view
- Windows: Fix harmless error popup if user tries to launch calibre multiple times in quick succession