01 Jul 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 26.05.01 can be downloaded from:
Installation instructions can be found at:
Koha 26.05.01 is a bugfix/maintenance release.
It includes 2 enhancements, 56 bugfixes.
System requirements
You can learn about the system components (like OS and database) needed for running Koha on the community wiki.
Updates changes to the 25.11 release team, and adds the details of people in the 26.05 release team. (More > About Koha > Koha team.)
This fixes an accessibility issue on the patron's OPAC account messaging preferences form: Missing legend for the fieldset with submit changes and cancel buttons.
It adds a legend tag "visible" for screen reader patrons so that it is clear for the group of buttons what they are being asked to do.
42498 Accessibility - Page tabs/pagination on results in opac produces accessibility error "Aria state or property has invalid value"
Sponsored by Athens County Public Libraries
This fixes a 500 page error[1] when creating a suggestion in the staff interface if: - the EmailPurchaseSuggestions system preference is set to "email address of library", and - the library for acquisition information is set to "Any".
[1] Can't call method "inbound_email_address" on an undefined value at /kohadevbox/koha/Koha/Suggestion.pm line 107
32938 Acquisitions EDI - ORDRSP messages are loaded as invoices
Sponsored by OpenFifth
This fixes entering suggestions using the staff interface. When making a suggestion the default library selected was "Any". The default library is now the current library you are logged in as.
After creating a suggestion, the staff patron is now redirected back to the patron's purchase suggestion page. Previously, they stayed on the list of suggestions on the suggestion management page in acquisitions.
(This fixes an error introduced by Bug 39721 - Remove GetSuggestion from C4/Suggestions.pm, added to Koha 26.05 and 25.11.)
"Suggested by" was being recorded as the logged in librarian, instead of the patron that made the suggestion.
41829 Tag editor button has wrong id on copied MARC field when value builder plugin is used
Sponsored by Koha-Suomi Oy
42178 The Close button submits the remove from bundle form
Sponsored by Lund University Library
41705 Popup blockers may be triggered by options to automatically display payment receipt for printing after making a payments
Sponsored by OpenFifth
This fixes the "Staged & ready (0)" tab for curbside pickups (Circulation > Holds and bookings > Curbside pickup) so that it uses "and" instead of "&" in the table title, as per the terminology guidelines (when CurbsidePickup is enabled).
This fixes indexing of records, so that when a new title is added in the ERM module (ERM > eHoldings > Local > Titles) and 'Create bibliographic record' is selected, the new record can be found when searching.
42395 Missing translations for the existing holds table (load_patron_holds_table) for a record in the staff interface
This fixes the translatability of strings for the existing holds table in the staff interface for a record (Staff interface > [details page for a record] > Holds > Existing holds).
These strings were not previously translated:
- Priority column: In transit, Waiting, and In processing
- Change priority column: tooltip text for arrows: . Move hold up . Move hold to top . Move hold to bottom . Move hold down
Sponsored by Koha-Suomi Oy
This fixes the labels for facets in the OPAC. Customized facets generated from mappings.yaml were displayed with the technical type_id instead of the proper label.
For example, for a facet defined as "su-gen" with a label of "Genre/Form", "su-gen" was used as the label instead of "Genre/Form".
(This is related to Bug 25314 - Make OPAC facets collapse, added to Koha 26.05.00,25.11.04.)
34973 Update Font Awesome for the OPAC to fix JavaScript warning in the console for Firefox: "Glyph bbox was incorrect"
This fixes browser console JavaScript errors about Font Awesome fonts for the OPAC when using Firefox. The version of Font Awesome used was upgraded from 6.3 to 7.2 as part of fixing this.
Sponsored by Athens County Public Libraries
This fixes the "Add guarantor" pop-up window when adding a guarantor for a patron.
The form was populating the "Sort 2" field with the value from the patron you are adding the guarantor to (if they had values stored for the Sort 1 and Sort 2 fields in the library management section).
This fixes showing item type images in the staff interface holdings table.
Item type images weren't showing where noItemTypeImages was set to "Show", and were showing when it was set to "Don't show" (the opposite of what it should be).
The correct behavour for the noItemTypeImages system preference is now restored: - If set to "Show", the item type image is shown. - If set to "Don't show", the item type image is not shown.
(This was a regression from bug 41566 - Tidy kohaTable block - catalogue, added to Koha 26.05.)
42154 Bug 38714 hid the "New match check" link in record matching rules
Sponsored by Athens County Public Libraries
42441 Remove event attributes from authority merge template
Sponsored by Athens County Public Libraries
Changes opac to OPAC for these system preference descriptions: - NovelistSelectProfile - item-level_itypes - OpacSuppressionByIPRange
Note: This only affects new Koha installations. Existing installations need to either manually update the notice or replace the existing notice with the default notice text.
42695 Minor language and markup corrections to reports error messages
This fixes the HTML markup for some report error messages, along with some minor text changes:
- Uses an H1 for the heading
- Uses p for paragraphs
Sponsored by Athens County Public Libraries
This enhancement adds a "Send test email" action on the SMTP servers administration page.
It sends a test message to the address in the KohaAdminEmailAddress system preference and reports success or failure.
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 26.05.01 is
Release Manager: Pedro Amorim
QA Manager: Lisette Scheer
QA Team:
Documentation Manager: Aude Charillon
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 26.05.01
We thank the following individuals who contributed patches to Koha 26.05.01
We thank the following libraries, companies, and other institutions who contributed patches to Koha 26.05.01
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 26.05.x-security.
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 01 Jul 2026 21:53:01.