21 Apr 2026
Koha is the first free and open source software library automation package (ILS). Development is sponsored by libraries of varying types and sizes, volunteers, and support companies from around the world. The website for the Koha project is:
Koha 25.05.09 can be downloaded from:
Installation instructions can be found at:
Koha 25.05.09 is a bugfix/maintenance release.
It includes 1 enhancements, 31 bugfixes.
System requirements
You can learn about the system components (like OS and database) needed for running Koha on the community wiki.
This change validates the inputs to "unapi" so that any invalid inputs will result in a 400 error or a response containing valid options for follow-up requests.
This fixes the URL for the "Cancel order and catalog record" link when receiving an order for an invoice - the referrer section of the URL was missing.
This fixes the CSV export from item search results in the staff interface (Search > Item search> Export select results (X) to CSV).
It removes extra spaces after the comma separator, which causes issues when using the CSV file with some applications (such as Microsoft Excel).
41142 Update jQuery-validate plugin to 1.21.0
Sponsored by Athens County Public Libraries
This fixes an XML validation error ("Can't validate the xml data from (...)/marc21_field_00{6,8}.xml") when using the tag editor for MARC21 fields 006/008. The tag editor now works as expected for these fields.
If a 856$u for a record had spaces before or after the URL, the link shown on the record page on the OPAC and staff interface (under 'Online resources') did not work.
Depending on the browser, either nothing happened, or an error was shown that the site wasn't reachable.
Examples that previously caused links not to work (without the quotes): - " koha-community.org" - "koha-community.org " - " koha-community.org "
41055 Missing accesskey attribute for print button (shortcut P)
Sponsored by Koha-Suomi Oy
This fixes a regression when checking in an item. Clicking the "Ignore" option in the dialog box, when an item already has a waiting status, just reloaded the dialog box. Clicking the "Ignore" option now closes the dialog box and works as expected.
This fixes a bug on the OPAC create ILL request form which was always setting the library to the patron's library, ignoring the library selection made on the form.
Currently, if a patron has not set any messaging preferences for notifying them about holds filled, a print notice is still generated.
With this change, a notice is now only generated for a patron if their messaging preferences for 'Hold filled' are set. This matches the behavor for overdue and hold reminder notices.
This fixes the "Search patrons" option in the staff interface menu bar. Currently, clicking "Search patrons" and then the arrow (without entering a value) automatically performs a search.
With this change, a patron search is now no longer automatic. If you don't enter anything, or don't select any options, you are now prompted (using a tooltip) to enter a patron name or card number.
NOTE: This is a change in behavour from what you may be used to.
This fixes an error that may occur when starting the SIP server: "...Couldn't become gid "
": Operation not permitted...". Koha was passing an incorrect value to the Net::Server "group" parameter.
Editing a serial and removing the dates in the "Published on" and "Expected on" fields generated a 500 error (Serials > [selected serial] > Serial collection).
This fixes the error and: - Sets the data in the database to NULL - Shows the dates as "Unknown" in the serial collection table for the "Date published" and "Date received" columns - Changes any existing 0000-00-00 dates in the database to NULL (for existing installations)
This fixes the translatability of the text shown when the FilterSearchResultsByLoggedInBranch system preference is enabled, and also the check and what is shown only works when not translated.
41431 Circulation rule notes dropping when editing rule
This fixes editing circulation and fine rules with notes - notes are now correctly shown when editing, and are not lost when saving the rule.
Previously, if you edited a rule with a note, it was not displayed in the edit field and was removed when the rule was saved.
Sponsored by Koha-Suomi Oy
This updates the description for the
staffShibOnlysystem preference and fixes grammar and spelling: - "login" to "log in" - "shibboleth" to "Shibboleth" (capitalized)
This fixes the capitalization for a log viewer message: "Override Renew hold for another" to "Override renew hold for another".
41764 ISSN hidden input missing from Z39.50 search form navigation
This fixes the Acquisitions and Cataloging Z39.50 search forms so that the pagination works when searching using the ISSN input field.
When you click the next page of results, or got to a specific result page, the search now works as expected - it remembers the ISSN you were searching for, with "You searched for: ISSN: XXXX" shown above the search results, and search results shown.
Previously, the ISSN was not remembered, and "Nothing found. Try another search." was shown, and no further search results were shown.
Sponsored by Athens County Public Libraries
This fixes a regression where the local cover images were no longer displayed in lists in the OPAC and staff interface. With this fix, the local cover images are back in the lists in both interfaces.
The Koha manual is maintained in Sphinx. The home page for Koha documentation is
Koha Documentation As of the date of these release notes, the Koha manual is available in the following languages:
The Git repository for the Koha manual can be found at
Complete or near-complete translations of the OPAC and staff interface are available in this release for the following languages:
Partial translations are available for various other languages.
The Koha team welcomes additional translations; please see
For information about translating Koha, and join the koha-translate list to volunteer:
The most up-to-date translations can be found at:
The release team for Koha 25.05.09 is
Release Manager: Lucas Gass
QA Manager: Martin Renvoize
QA Team:
Documentation Manager: David Nind
Documentation Team:
Translation Manager: Jonathan Druart
Wiki curators:
Release Maintainers:
Release Maintainer assistants:
We thank the following libraries, companies, and other institutions who are known to have sponsored new features in Koha 25.05.09
We thank the following individuals who contributed patches to Koha 25.05.09
We thank the following libraries, companies, and other institutions who contributed patches to Koha 25.05.09
We also especially thank the following individuals who tested patches for Koha
We regret any omissions. If a contributor has been inadvertently missed, please send a patch against these release notes to koha-devel@lists.koha-community.org.
The Koha project uses Git for version control. The current development version of Koha can be retrieved by checking out the main branch of:
The branch for this version of Koha and future bugfixes in this release line is 25.05.x.
Bug reports and feature requests can be filed at the Koha bug tracker at:
He rau ringa e oti ai. (Many hands finish the work)
Autogenerated release notes updated last on 21 Apr 2026 23:56:15.