[Bug]: Folder creation/renaming failed on team folders with share

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Renaming a folder within a (sub-) directory of a teamfolder, which is additional shared to another user group, is not possible.
When using Windows sync client it's not longer possible to create new folders with specified name, because windows always creates "new folder" first before asking for the name, and the client synchronizes this folder before its locally renamed.

Steps to reproduce

1. Create a teamfolder "team_folder" with an user group "group a" with all rights
2. Create a subfolder within these teamfolder "sub"
3. Create a share on "sub" to "group b" with all rights
4. Try to create a new folder "test" using a member from "group a" within "sub". Folder is created without error.
5. Try to rename "test" into "test1"
   => You'll get an error message, that the folder cannot be renamed.
   => In Systemlog you'll find an entry "Information | no app in context | Forbidden You cannot move a non-shareable node into a share"
6. When the share on "sub" is removed, than renaming "test" to "test1" is working again

Expected behavior

Renaming of a subfolder of "sub" should be possible, bus is denied.

Nextcloud Server version

32

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.3

Web server

Apache (supported)

Database engine version

MySQL

Is this bug present after an update or on a fresh install?

Upgraded to a MAJOR version (ex. 31 to 32)

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

{
    "system": {
        "apps_paths": [
            {
                "path": "\/snap\/nextcloud\/current\/htdocs\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/snap\/nextcloud\/current\/nextcloud\/extra-apps",
                "url": "\/extra-apps",
                "writable": true
            }
        ],
        "supportedDatabases": [
            "mysql"
        ],
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "memcache.local": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0
        },
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "***REMOVED SENSITIVE VALUE***",
            "***REMOVED SENSITIVE VALUE***"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "overwrite.cli.url": "http:\/\/localhost",
        "dbtype": "mysql",
        "version": "32.0.2.2",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "logtimezone": "UTC",
        "installed": true,
        "mail_smtpmode": "smtp",
        "mail_smtpauthtype": "LOGIN",
        "mail_smtpauth": 1,
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "25",
        "mail_smtpsecure": "tls",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "loglevel": 1,
        "maintenance": false,
        "trashbin_retention_obligation": "auto, 40",
        "twofactor_enforced": "false",
        "twofactor_enforced_groups": [],
        "twofactor_enforced_excluded_groups": [],
        "mysql.utf8mb4": true,
        "theme": "",
        "lost_password_link": "disabled",
        "data-fingerprint": "***REMOVED SENSITIVE VALUE***",
        "versions_retention_obligation": "auto, 180",
        "maintenance_window_start": 1,
        "forbidden_filename_basenames": [
            "con",
            "prn",
            "aux",
            "nul",
            "com0",
            "com1",
            "com2",
            "com3",
            "com4",
            "com5",
            "com6",
            "com7",
            "com8",
            "com9",
            "com\u00b9",
            "com\u00b2",
            "com\u00b3",
            "lpt0",
            "lpt1",
            "lpt2",
            "lpt3",
            "lpt4",
            "lpt5",
            "lpt6",
            "lpt7",
            "lpt8",
            "lpt9",
            "lpt\u00b9",
            "lpt\u00b2",
            "lpt\u00b3"
        ],
        "forbidden_filename_characters": [
            "<",
            ">",
            ":",
            "\"",
            "|",
            "?",
            "*",
            "\\",
            "\/"
        ],
        "forbidden_filename_extensions": [
            " ",
            ".",
            ".filepart",
            ".part"
        ],
        "default_language": "de",
        "default_locale": "de_DE"
    }
}

List of activated Apps

Enabled:
  - activity: 5.0.0-dev.0
  - admin_audit: 1.22.0
  - app_api: 32.0.0
  - bruteforcesettings: 5.0.0-dev.0
  - calendar: 6.1.0
  - circles: 32.0.0
  - cloud_federation_api: 1.16.0
  - comments: 1.22.0
  - contacts: 8.1.0
  - dav: 1.34.2
  - federatedfilesharing: 1.22.0
  - files: 2.4.0
  - files_downloadlimit: 5.0.0-dev.0
  - files_reminders: 1.5.0
  - files_retention: 3.0.0
  - files_sharing: 1.24.1
  - files_trashbin: 1.22.0
  - files_versions: 1.25.0
  - groupfolders: 20.1.4
  - logreader: 5.0.0-dev.0
  - lookup_server_connector: 1.20.0
  - nextcloud_announcements: 4.0.0-dev.0
  - notes: 4.12.4
  - notifications: 5.0.0-dev.0
  - oauth2: 1.20.0
  - password_policy: 4.0.0-dev.0
  - privacy: 4.0.0-dev.0
  - profile: 1.1.0
  - provisioning_api: 1.22.0
  - quota_warning: 1.22.0
  - recommendations: 5.0.0-dev.0
  - related_resources: 3.0.0-dev.0
  - serverinfo: 4.0.0-dev.0
  - settings: 1.15.1
  - sharebymail: 1.22.0
  - systemtags: 1.22.0
  - tasks: 0.17.1
  - text: 6.0.1
  - theming: 2.7.0
  - twofactor_backupcodes: 1.21.0
  - twofactor_totp: 14.0.0
  - user_status: 1.12.0
  - user_usage_report: 3.0.0
  - viewer: 5.0.0-dev.0
  - webhook_listeners: 1.3.0
  - workflowengine: 2.14.0
Disabled:
  - admin_notifications: 1.0.2 (installed 1.0.2)
  - contactsinteraction: 1.13.1 (installed 1.10.0)
  - dashboard: 7.12.0 (installed 7.0.0)
  - documentserver_community: 0.2.1 (installed 0.2.1)
  - encryption: 2.20.0
  - federation: 1.22.0 (installed 1.6.0)
  - files_accesscontrol: 3.0.2 (installed 3.0.2)
  - files_external: 1.24.0 (installed 1.7.0)
  - files_pdfviewer: 5.0.0-dev.0 (installed 1.8.0)
  - files_rightclick: 0.15.1 (installed 1.6.0)
  - files_trackdownloads: 1.11.0 (installed 1.11.0)
  - firstrunwizard: 5.0.0-dev.0 (installed 2.9.0)
  - mail: 5.6.1 (installed 1.9.5)
  - onlyoffice: 9.11.0 (installed 9.11.0)
  - photos: 5.0.0-dev.1 (installed 1.1.0)
  - richdocuments: 9.0.1 (installed 9.0.1)
  - richdocumentscode: 25.4.702 (installed 25.4.702)
  - spreed: 22.0.4 (installed 22.0.4)
  - support: 4.0.0-dev.0 (installed 1.3.0)
  - survey_client: 4.0.0-dev.0 (installed 1.4.0)
  - suspicious_login: 10.0.0-dev.0
  - twofactor_nextcloud_notification: 6.0.0-dev.0
  - user_ldap: 1.23.0
  - weather_status: 1.12.0 (installed 1.0.0)
  - workflow_script: 3.0.0 (installed 3.0.0)

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

{"reqId":"<...>","level":1,"time":"2025-11-27T12:38:36+00:00","remoteAddr":"<...>","user":"<...>","app":"no app in context","method":"MOVE","url":"/remote.php/dav/files/<username>/team_folder/sub/test1","message":"Uncaught exception","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:145.0) Gecko/20100101 Firefox/145.0","version":"32.0.2.2","exception":{"Exception":"OCA\\DAV\\Connector\\Sabre\\Exception\\Forbidden","Message":"You cannot move a non-shareable node into a share","Code":0,"Trace":[{"file":"/snap/nextcloud/51274/htdocs/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"validateMoveOrCopy","class":"OCA\\DAV\\Connector\\Sabre\\SharesPlugin","type":"->"},{"file":"/snap/nextcloud/51274/htdocs/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":603,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/snap/nextcloud/51274/htdocs/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpMove","class":"Sabre\\DAV\\CorePlugin","type":"->"},{"file":"/snap/nextcloud/51274/htdocs/3rdparty/sabre/dav/lib/DAV/Server.php","line":472,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/snap/nextcloud/51274/htdocs/apps/dav/lib/Connector/Sabre/Server.php","line":211,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/snap/nextcloud/51274/htdocs/apps/dav/lib/Server.php","line":424,"function":"start","class":"OCA\\DAV\\Connector\\Sabre\\Server","type":"->"},{"file":"/snap/nextcloud/51274/htdocs/apps/dav/appinfo/v2/remote.php","line":22,"function":"exec","class":"OCA\\DAV\\Server","type":"->"},{"file":"/snap/nextcloud/51274/htdocs/remote.php","line":151,"args":["/snap/nextcloud/51274/htdocs/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/snap/nextcloud/51274/htdocs/apps/dav/lib/Connector/Sabre/SharesPlugin.php","Line":267,"message":"Uncaught exception","exception":[],"CustomMessage":"Uncaught exception"},"id":"<...>"}

Additional info

We use this structure "team_folder" (group_folder before) together with shared subfolders (e.g. for offices) since at least 5 years - the first problem here occurs about 4 weeks ago, so it should be related to some update (maybe Nextcloud 32).

We are using Ubuntu SNAP installation (current master).