Calibre

calibre 9.2.0​

• New features:
• ZIP Output: Change the template engine used for HTML templating from templite to Mustache, for greater safety and performance. Note that this is a breaking change if you use custom templates with ZIP output (CVE-2026-25731)
• Check library: Add an option to rebuild the annotations search index
• Bug fixes:
• CHM Input: Ignore internal files that have paths that end up outside the container. Prevents path traversal attacks with malicious CHM files (CVE-2026-25635)
• EPUB Input: Ensure font obfuscation processing happens only on files from the EPUB, preventing path traversal attacks from malicious EPUB files (CVE-2026-25636)
• Windows: Workaround for bug in Qt 6.10 causing Read Aloud in the E-book viewer to crash when stopped and restarted
• Fix drag and drop of books into bookshelf view not working
• Bookshelf: Fix bookshelf view blank on some macOS systems
• E-book viewer: Fix a regression in calibre 9.0 that broke the Go to page function
• E-book viewer: Fix google dictionary lookup results not legible
• E-book viewer: Fix PageUp/PageDown keys needing to be pressed repeatedly at internal HTML file boundaries in flow mode
• Bookshelf: Avoid rendering during initial show while the view is still being resized
• Fix a regression in calibre 9.0 that caused mouse wheel to scroll a full row at a time in the Cover grid
• News download: Fix a regression in 8.11 that broke automatic cleanup of downloaded HTML

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calibre 9.2.1​

New features​

• ZIP Output: Change the template engine used for HTML templating from templite to Mustache, for greater safety and performance. Note that this is a breaking change if you use custom templates with ZIP output (CVE-2026-25731)
• Check library: Add an option to rebuild the annotations search index
  Closes tickets:
  Zaloguj lub Zarejestruj się aby zobaczyć!

Bug fixes​

• CHM Input: Ignore internal files that have paths that end up outside the container. Prevents path traversal attacks with malicious CHM files (CVE-2026-25635)
• EPUB Input: Ensure font obfuscation processing happens only on files from the EPUB, preventing path traversal attacks from malicious EPUB files (CVE-2026-25636)
• Windows: Workaround for bug in Qt 6.10 causing Read Aloud in the E-book viewer to crash when stopped and restarted
  Closes tickets:
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• Fix drag and drop of books into bookshelf view not working
  Closes tickets:
  Zaloguj lub Zarejestruj się aby zobaczyć!
• Bookshelf: Fix bookshelf view blank on some macOS systems
  Closes tickets:
  Zaloguj lub Zarejestruj się aby zobaczyć!
• E-book viewer: Fix a regression in calibre 9.0 that broke the Go to page function
  Closes tickets:
  Zaloguj lub Zarejestruj się aby zobaczyć!
• E-book viewer: Fix google dictionary lookup results not legible
  Closes tickets:
  Zaloguj lub Zarejestruj się aby zobaczyć!
• E-book viewer: Fix PageUp/PageDown keys needing to be pressed repeatedly at internal HTML file boundaries in flow mode
• Bookshelf: Avoid rendering during initial show while the view is still being resized
• Fix a regression in calibre 9.0 that caused mouse wheel to scroll a full row at a time in the Cover grid
• News download: Fix a regression in 8.11 that broke automatic cleanup of downloaded HTML
• Version 9.2.1 prevents the Content server from using template based searches since this is insecure when the content server is used with un-authenticated users
  Closes tickets:
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Calibre 9.3.0​

New 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
  Closes tickets:
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Bug fixes​

• Make the new pages column value available in save to disk/send to device templates
  Closes tickets:
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• Hanvon N10 device driver: Fix calibre unable to put its metadata files onto the device
  Closes tickets:
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• 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
  Closes tickets:
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• Windows: Fix calibre not exiting on quit when the wireless device driver is used in calibre 9
  Closes tickets:
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• 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
  Closes tickets:
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• Windows: Fix a regression in calibre 9 that caused tooltips to not follow the color scheme
  Closes tickets:
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• PDF Input: Fix PDF Outline not being converted to Table of Contents in output document when using the calibre engine
  Closes tickets:
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• 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

Improved news sources​

• Financial Times
• The Asahi Shimbun
• Todoist

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Calibre 9.3.1​

Calibre 9.4.0​

Release: 9.4 [27 Feb, 2026]​

New features​

• E-book viewer: Add "reading stats" to show reading progress
  Closes tickets:
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• 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
  Closes tickets:
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• ODT Input: Fix a regression in the previous release that broke conversion of images
  Closes tickets:
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• 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)

Improved news sources​

• WIRED Daily
• TOI Print Edition

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