[Bug]: After latest update of PHP packages (Ubuntu), Admin > System raises a Bad Request (HTTP 502)

[DecaTec]

⚠️ 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

System:

• Ubuntu 24.04.4 LTS
• PHP 8.3.6 (from Ubuntu repo, not from PPA)

The "System" page in the admin settings lead to HTTP 502.

Steps to reproduce

Do apt update && apt upgrade: PHP-Packages get updated: 8.3.6-0ubuntu0.24.04.6 => 8.3.6-0ubuntu0.24.04.7

Go into NC and call "System" in the admin settings.

Result: HTTP 502 (Bad Gateway).

Hint: This worked with the previous PHP version 8.3.6-0ubuntu0.24.04.6

Expected behavior

The System page should be shown as usual

Nextcloud Server version

32

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.3

Web server

Nginx

Database engine version

PostgreSQL

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

Fresh Nextcloud Server install

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": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "mydomain.com"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "32.0.6.1",
        "overwrite.cli.url": "https:\/\/mydomain.com",
        "overwriteprotocol": "https",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "5432",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauthtype": "LOGIN",
        "mail_smtpauth": 1,
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "logtimezone": "Europe\/Berlin",
        "auth.bruteforce.protection.enabled": false,
        "filelocking.enabled": true,
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "password": "***REMOVED SENSITIVE VALUE***",
            "timeout": 0,
            "dbindex": 1
        },
        "skeletondirectory": "",
        "maintenance": false,
        "default_language": "de_DE",
        "default_locale": "de_DE",
        "loglevel": 2,
        "app_install_overwrite": [
            "keeweb",
            "files_fulltextsearch_tesseract",
            "bbb",
            "tasks"
        ],
        "updater.release.channel": "stable",
        "theme": "",
        "default_phone_region": "DE",
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "allow_local_remote_servers": true,
        "profile.enabled": false,
        "data-fingerprint": "8fedb756ed914b25b7f2f09719445406",
        "simpleSignUpLink.shown": false,
        "maintenance_window_start": 1,
        "twofactor_enforced": "false",
        "twofactor_enforced_groups": [],
        "twofactor_enforced_excluded_groups": [
            "admin"
        ]
    }
}

List of activated Apps

Enabled:
  - activity: 5.0.0
  - admin_audit: 1.22.0
  - announcementcenter: 7.3.0
  - app_api: 32.0.0
  - assistant: 2.13.0
  - calendar: 6.2.1
  - circles: 32.0.0
  - cloud_federation_api: 1.16.0
  - comments: 1.22.0
  - contacts: 8.3.4
  - dashboard: 7.12.0
  - dav: 1.34.2
  - deck: 1.16.3
  - federatedfilesharing: 1.22.0
  - federation: 1.22.0
  - files: 2.4.0
  - files_accesscontrol: 3.0.2
  - files_downloadlimit: 5.0.0-dev.0
  - files_external: 1.24.1
  - files_fulltextsearch: 32.0.2
  - files_fulltextsearch_tesseract: 32.0.0
  - files_pdfviewer: 5.0.0
  - files_reminders: 1.5.0
  - files_sharing: 1.24.1
  - files_trashbin: 1.22.0
  - files_versions: 1.25.0
  - fulltextsearch: 32.0.0
  - fulltextsearch_elasticsearch: 32.0.2
  - integration_openai: 3.10.1
  - logreader: 5.0.0
  - lookup_server_connector: 1.20.0
  - notes: 4.13.0
  - notifications: 5.0.0
  - notify_push: 1.3.0
  - oauth2: 1.20.0
  - password_policy: 4.0.0
  - privacy: 4.0.0
  - profile: 1.1.0
  - provisioning_api: 1.22.0
  - related_resources: 3.0.0
  - richdocuments: 9.0.3
  - richdocumentscode: 25.4.902
  - serverinfo: 4.0.0
  - settings: 1.15.1
  - sharebymail: 1.22.0
  - side_menu: 5.2.1
  - spreed: 22.0.9
  - suspicious_login: 10.0.0
  - systemtags: 1.22.0
  - tasks: 0.17.1
  - text: 6.0.1
  - theming: 2.7.0
  - theming_customcss: 1.20.0
  - twofactor_backupcodes: 1.21.0
  - twofactor_nextcloud_notification: 6.0.0
  - twofactor_totp: 14.0.0
  - twofactor_webauthn: 2.6.0
  - updatenotification: 1.22.0
  - viewer: 5.0.0
  - webhook_listeners: 1.3.0
  - workflowengine: 2.14.0
Disabled:
  - bruteforcesettings: 5.0.0 (installed 2.4.0)
  - contactsinteraction: 1.13.1 (installed 1.8.0)
  - data_request: 4.0.1 (installed 4.0.1)
  - encryption: 2.20.0
  - firstrunwizard: 5.0.0 (installed 2.5.0)
  - groupfolders: 20.1.12 (installed 20.1.12)
  - nextcloud_announcements: 4.0.0 (installed 1.5.0)
  - photos: 5.0.0 (installed 1.3.0)
  - recommendations: 5.0.0 (installed 0.4.0)
  - support: 4.0.0 (installed 1.0.0)
  - survey_client: 4.0.0 (installed 1.4.0)
  - user_ldap: 1.23.0
  - user_status: 1.12.0 (installed 1.0.1)
  - weather_status: 1.12.0 (installed 1.0.0)
  - workflow_ocr: 1.32.1 (installed 1.32.1)

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

{"reqId":"4x8KwDBRSSNKFJH0l0Ea","level":0,"time":"2026-03-16T17:13:25+01:00","remoteAddr":"1.1.1.1","user":"User","app":"no app in context","method":"GET","url":"/settings/admin/serverinfo","scriptName":"/index.php","message":"The loading of lazy UserConfig values have been requested","userAgent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36","version":"32.0.6.1","exception":{"Exception":"RuntimeException","Message":"ignorable exception","Code":0,"Trace":[{"file":"/var/www/nextcloud/lib/private/Config/UserConfig.php","line":1738,"function":"loadConfig","class":"OC\\Config\\UserConfig","type":"->"},{"file":"/var/www/nextcloud/lib/private/Config/UserConfig.php","line":136,"function":"loadConfigAll","class":"OC\\Config\\UserConfig","type":"->"},{"file":"/var/www/nextcloud/lib/private/AllConfig.php","line":299,"function":"getKeys","class":"OC\\Config\\UserConfig","type":"->"},{"file":"/var/www/nextcloud/lib/private/Collaboration/Reference/ReferenceManager.php","line":249,"function":"getUserKeys","class":"OC\\AllConfig","type":"->"},{"file":"/var/www/nextcloud/lib/private/Collaboration/Reference/RenderReferenceEventListener.php","line":45,"function":"getUserProviderTimestamps","class":"OC\\Collaboration\\Reference\\ReferenceManager","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/ServiceEventListener.php","line":57,"function":"handle","class":"OC\\Collaboration\\Reference\\RenderReferenceEventListener","type":"->"},{"file":"/var/www/nextcloud/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":220,"function":"__invoke","class":"OC\\EventDispatcher\\ServiceEventListener","type":"->"},{"file":"/var/www/nextcloud/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":56,"function":"callListeners","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/EventDispatcher.php","line":67,"function":"dispatch","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/EventDispatcher.php","line":79,"function":"dispatch","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/apps/text/lib/Listeners/LoadEditorListener.php","line":34,"function":"dispatchTyped","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/ServiceEventListener.php","line":57,"function":"handle","class":"OCA\\Text\\Listeners\\LoadEditorListener","type":"->"},{"file":"/var/www/nextcloud/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":220,"function":"__invoke","class":"OC\\EventDispatcher\\ServiceEventListener","type":"->"},{"file":"/var/www/nextcloud/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":56,"function":"callListeners","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/EventDispatcher.php","line":67,"function":"dispatch","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/EventDispatcher.php","line":79,"function":"dispatch","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/apps/deck/lib/AppInfo/Application.php","line":88,"function":"dispatchTyped","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":220,"function":"OCA\\Deck\\AppInfo\\{closure}","class":"OCA\\Deck\\AppInfo\\Application","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":56,"function":"callListeners","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/EventDispatcher.php","line":67,"function":"dispatch","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/EventDispatcher.php","line":79,"function":"dispatch","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/apps/assistant/lib/Listener/BeforeTemplateRenderedListener.php","line":57,"function":"dispatchTyped","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/ServiceEventListener.php","line":57,"function":"handle","class":"OCA\\Assistant\\Listener\\BeforeTemplateRenderedListener","type":"->"},{"file":"/var/www/nextcloud/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":220,"function":"__invoke","class":"OC\\EventDispatcher\\ServiceEventListener","type":"->"},{"file":"/var/www/nextcloud/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":56,"function":"callListeners","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/EventDispatcher.php","line":67,"function":"dispatch","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/EventDispatcher.php","line":79,"function":"dispatch","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/apps/side_menu/lib/Service/AppRepository.php","line":30,"function":"dispatchTyped","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/apps/side_menu/lib/AppInfo/Application.php","line":60,"function":"__construct","class":"OCA\\SideMenu\\Service\\AppRepository","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":169,"function":"OCA\\SideMenu\\AppInfo\\{closure}","class":"OCA\\SideMenu\\AppInfo\\Application","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/3rdparty/pimple/pimple/src/Pimple/Container.php","line":122,"function":"OC\\AppFramework\\Utility\\{closure}","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":136,"function":"offsetGet","class":"Pimple\\Container","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/DependencyInjection/DIContainer.php","line":346,"function":"query","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/DependencyInjection/DIContainer.php","line":324,"function":"queryNoFallback","class":"OC\\AppFramework\\DependencyInjection\\DIContainer","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":90,"function":"query","class":"OC\\AppFramework\\DependencyInjection\\DIContainer","type":"->"},{"function":"OC\\AppFramework\\Utility\\{closure}","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":77,"function":"array_map"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":72,"function":"buildClassConstructorParameters","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":122,"function":"buildClass","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":140,"function":"resolve","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/DependencyInjection/DIContainer.php","line":352,"function":"query","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->"},{"file":"/var/www/nextcloud/lib/private/ServerContainer.php","line":135,"function":"queryNoFallback","class":"OC\\AppFramework\\DependencyInjection\\DIContainer","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Utility/SimpleContainer.php","line":45,"function":"query","class":"OC\\ServerContainer","type":"->"},{"file":"/var/www/nextcloud/lib/private/Settings/Manager.php","line":176,"function":"get","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->"},{"file":"/var/www/nextcloud/lib/private/Settings/Manager.php","line":308,"function":"getSettings","class":"OC\\Settings\\Manager","type":"->"},{"file":"/var/www/nextcloud/apps/settings/lib/Controller/CommonSettingsTrait.php","line":164,"function":"getAllowedAdminSettings","class":"OC\\Settings\\Manager","type":"->"},{"file":"/var/www/nextcloud/apps/settings/lib/Controller/AdminSettingsController.php","line":56,"function":"getIndexResponse","class":"OCA\\Settings\\Controller\\AdminSettingsController","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":204,"function":"index","class":"OCA\\Settings\\Controller\\AdminSettingsController","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":118,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/App.php","line":153,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Route/Router.php","line":321,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/nextcloud/lib/base.php","line":1091,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/nextcloud/index.php","line":25,"function":"handleRequest","class":"OC","type":"::"}],"File":"/var/www/nextcloud/lib/private/Config/UserConfig.php","Line":1752,"message":"The loading of lazy UserConfig values have been requested","exception":{},"CustomMessage":"The loading of lazy UserConfig values have been requested"}}

Additional info

No response

[SystemKeeper]

This looks the same as #58945 ?
Can you check the error log for a segmentation fault?

[DecaTec]

Yes, seems to be the same.

What's the "official" recommendation here? Switching to PHP PPA?

[SystemKeeper]

From the title it seems to be this: https://bugs.launchpad.net/ubuntu/+source/php8.3/+bug/2144556. Can't fully check, as launchpad is down...

As a workaround do an early return (return false;) in https://github.com/nextcloud/serverinfo/blob/45f592795acb02c55cf1981248814d0fa751ebb2/lib/FpmStatistics.php#L38-L46 (again, just judging from the title of the launchpad bug)

[DecaTec]

Hi,

thanks, the workaround works.

I there any chance that there will be changes in the serverinfo app to mitigate the problem, e.g. some "try-catch" mechanism, so when the PHP process crashes, the System page will still be shown?

[SystemKeeper]

I don’t think that’s possible, if the process crashes mid-processing, nothing can be output. But maybe someone else knows.

In any case, this is a PHP issue, nothing in our code base.

[joshtrichards]

Only Debian/Ubuntu can address it since it's specific to their package, and specifically to the 2026-03-12 version they pushed out for this scorecard related FPM fix: https://bugs.launchpad.net/ubuntu/+source/php8.3/+bug/2130569

It's a non-issue in later PHP 8.3.x versions based on reports so presumably:

• it's a regression introduced from their "unofficial" (from PHP's perspective) backported bug fix.
• or the change itself is fine, but it triggered some other previously irrelevant but also probably already fixed upstream bug. Hah.

I there any chance that there will be changes in the serverinfo app to mitigate the problem, e.g. some "try-catch" mechanism, so when the PHP process crashes, the System page will still be shown?

No, this is a lower level issue.

[DecaTec]

OK, thanks for the clarification!

[joshtrichards]

Status in Ubuntu bug tracker have changed to "confirmed": https://bugs.launchpad.net/ubuntu/+source/php8.3/+bug/2144556

Going to close this here since we're unlikely to need to track any direct follow-up here.