[Bug]: Share within Share inherits permissions if using internal link or Shares/"shared_with_me" from NavBar

⚠️ 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

This is with version 31.0.13, as well as 31.0.14.
(EDIT: Updated to 32.0.6)

'share_folder' => '/Shared_with_me',

Internal links and shared_with_me from Navigation bar for nested Shares inherent permissions from parent folder. Both folders are shared independently, but the path and thus the permissions are different if one is opening the folders via "All Files"/Shared_with_me OR using "Shared_with_me" from the navbar and internal links.

Steps to reproduce

1. Create two circles A and B
2. Create parent folder PARENT and sub folder CHILD within PARENT
3. Share PARENT to A with read-only
4. Share CHILD to B with read-write
5. Create and use internal link of CHILD, OR find CHILD in "Shared_with_me" and open it from there (you have read-only access)
6. (If you go from "All Files"/"Shared_with_me" to CHILD, then you have read-write access)

Expected behavior

It should directly link to the respective share without the parent folder. It should behave like point 6 from "Steps to reproduce".
This or that way, it should behave the same in both methods (5 and 6).

Nextcloud Server version

32

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.3

Web server

Apache (supported)

Database engine version

PostgreSQL

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

None

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": {
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "nxcl.REDACTED",
            "nxcl.REDACTED"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "31.0.14.1",
        "overwrite.cli.url": "https:\/\/nxcl.REDACTED",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "htaccess.RewriteBase": "\/",
        "check_for_working_htaccess": "true",
        "remember_login_cookie_lifetime": "604800",
        "session_lifetime": "86400",
        "session_keepalive": true,
        "auto_logout": false,
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "default_phone_region": "DE",
        "skeletondirectory": " ",
        "profile.enabled": false,
        "quota_include_external_storage": false,
        "default_language": "de",
        "default_locale": "de_DE",
        "knowledgebaseenabled": false,
        "upgrade.disable-web": "true",
        "updater.release.channel": "stable",
        "maintenance_window_start": "1",
        "loglevel": 1,
        "log_type": "file",
        "logfile": "\/tmpnxcl\/nxcl_log_path\/nextcloud.log",
        "trashbin_retention_obligation": "auto, 30",
        "versions_retention_obligation": "auto, 30",
        "activity_expire_days": "14",
        "enable_previews": "true",
        "preview_max_x": "1024",
        "preview_max_y": "768",
        "preview_max_scale_factor": "1",
        "enabledPreviewProviders": [
            "OC\\Preview\\PNG",
            "OC\\Preview\\JPEG",
            "OC\\Preview\\GIF",
            "OC\\Preview\\BMP",
            "OC\\Preview\\XBitmap",
            "OC\\Preview\\Movie",
            "OC\\Preview\\MP3",
            "OC\\Preview\\TXT",
            "OC\\Preview\\MarkDown",
            "OC\\Preview\\MP4",
            "OC\\Preview\\PDF"
        ],
        "auth.bruteforce.protection.enabled": "true",
        "overwriteprotocol": "https",
        "forbidden_filenames": [
            ".htaccess",
            "Thumbs.db",
            "thumbs.db"
        ],
        "check_data_directory_permissions": "true",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": "6379"
        },
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "filelocking.enabled": "true",
        "ldapProviderFactory": "OCA\\User_LDAP\\LDAPProviderFactory",
        "lost_password_link": "REDACTED",
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "share_folder": "\/Shared_with_me",
        "mail_smtpport": "587",
        "maintenance": false,
        "auth.webauthn.enabled": false,
        "mail_smtpsecure": "tls",
        "mail_smtpauth": 1,
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "cache_path": "\/tmpnxcl\/nxcl_cache_path",
        "files.chunked_upload.max_size": 314572800
    }
}

List of activated Apps

Enabled:
  - activity: 4.0.0
  - app_api: 5.0.2
  - assistant: 2.12.0
  - bruteforcesettings: 4.0.0
  - calendar: 5.5.14
  - circles: 31.0.0
  - cloud_federation_api: 1.14.0
  - contacts: 7.3.13
  - contactsinteraction: 1.12.1
  - dav: 1.33.0
  - deck: 1.15.6
  - federatedfilesharing: 1.21.0
  - federation: 1.21.0
  - files: 2.3.1
  - files_downloadlimit: 4.0.0
  - files_pdfviewer: 4.0.0
  - files_reminders: 1.4.0
  - files_sharing: 1.23.2
  - files_trashbin: 1.21.0
  - files_versions: 1.24.0
  - forms: 5.2.4
  - integration_openai: 3.10.0
  - logreader: 4.0.0
  - lookup_server_connector: 1.19.0
  - notes: 4.13.0
  - notifications: 4.0.0
  - notify_push: 1.3.0
  - oauth2: 1.19.1
  - photos: 4.0.0
  - privacy: 3.0.0
  - profile: 1.0.0
  - provisioning_api: 1.21.0
  - recommendations: 4.0.0
  - related_resources: 2.0.0
  - richdocuments: 8.7.7
  - serverinfo: 3.0.0
  - settings: 1.14.0
  - sharebymail: 1.21.0
  - spreed: 21.1.9
  - systemtags: 1.21.1
  - text: 5.0.2
  - theming: 2.6.1
  - twofactor_backupcodes: 1.20.0
  - twofactor_totp: 13.0.0-dev.0
  - twofactor_webauthn: 2.4.1
  - user_ldap: 1.22.0
  - viewer: 4.0.0
  - webhook_listeners: 1.2.0
  - workflowengine: 2.13.0
Disabled:
  - admin_audit: 1.21.0
  - apporder: 0.15.0 (installed 0.15.0)
  - checksum: 2.0.3 (installed 2.0.3)
  - comments: 1.21.0 (installed 1.21.0)
  - dashboard: 7.11.0 (installed 7.4.0)
  - encryption: 2.19.0
  - external: 6.0.2 (installed 6.0.2)
  - extract: 1.3.6 (installed 1.3.6)
  - files_external: 1.23.1 (installed 1.21.0)
  - files_retention: 2.0.1 (installed 2.0.1)
  - files_rightclick: 0.15.1 (installed 1.6.0)
  - firstrunwizard: 4.0.0 (installed 2.13.0)
  - nextcloud_announcements: 3.0.0 (installed 1.13.0)
  - password_policy: 3.0.0 (installed 1.14.0)
  - quicknotes: 0.8.30 (installed 0.8.30)
  - support: 3.0.0 (installed 1.10.0)
  - survey_client: 3.0.0 (installed 1.12.0)
  - suspicious_login: 9.0.1
  - tasks: 0.17.1 (installed 0.17.1)
  - terms_of_service: 4.6.1 (installed 4.6.1)
  - twofactor_nextcloud_notification: 5.0.0
  - updatenotification: 1.21.0 (installed 1.14.0)
  - user_status: 1.11.0 (installed 1.4.0)
  - weather_status: 1.11.0 (installed 1.4.0)

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

Additional info

No response

Start by reproducing the nested-share scenario with parent read-only access and child read-write access, comparing the internal link, Shared_with_me navigation, and All Files paths. Trace the server-side handling of these entry points and verify that each path resolves the child share independently; done means both navigation methods provide the same permissions.