[Bug]: Update to latest versions of php8.3 causes admin/serverinfo page to become inaccessible.

[jonhwood]

⚠️ 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

I updated my nextcloud server today with apt and it installed new versions of a lot of php 8.3 packages. Afterwards, I am unable to access the administrator control panel's Server Info page. it has the following error:

`Service Unavailable

The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.`

checking the logs I can see in the apache logs the following:
error.log
[Sat Mar 14 08:17:57.775825 2026] [proxy_fcgi:error] [pid 18830:tid 131285053855424] [client 172.16.150.25:60668] AH01067: Failed to read FastCGI header [Sat Mar 14 08:17:57.775969 2026] [proxy_fcgi:error] [pid 18830:tid 131285053855424] (104)Connection reset by peer: [client 172.16.150.25:60668] AH01075: Error dispatching request to :

The apt history log shows the following upgrades occurred:
Start-Date: 2026-03-14 07:04:52 Commandline: /usr/bin/apt-get -y -o Dpkg::Options::=--force-confdef -o Dpkg::Options::=--force-confold -o DPkg::Lock::Timeout=60 dist-upgrade --auto-remove Requested-By: ansible (1001) Upgrade: php8.3-xml:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), containerd.io:amd64 (2.2.1-1~ubuntu.24.04~noble, 2.2.2-1~ubuntu.24.04~noble), php8.3-zip:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), libnftables1:amd64 (1.0.9-1build1, 1.0.9-1ubuntu0.1), php8.3-mbstring:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), php8.3-common:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), php8.3-readline:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), php8.3-opcache:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), powershell:amd64 (7.5.4-1.deb, 7.5.5-1.deb), libapache2-mod-php8.3:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), php8.3-curl:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), php8.3-intl:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), php8.3-mysql:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), php8.3-bcmath:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), php8.3-bz2:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), php8.3-cli:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), php8.3-fpm:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), php8.3-gmp:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), php8.3-ldap:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), php8.3-gd:amd64 (8.3.6-0ubuntu0.24.04.6, 8.3.6-0ubuntu0.24.04.7), nftables:amd64 (1.0.9-1build1, 1.0.9-1ubuntu0.1) End-Date: 2026-03-14 07:06:32

Steps to reproduce

1. Upgrade php8.3fpm to latest version
2. Navigate to https://server/settings/admin/serverinfo
3. Error

Expected behavior

Server Status page should display

Nextcloud Server version

33

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.3

Web server

Apache (supported)

Database engine version

MariaDB

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

None

Are you using the Nextcloud Server Encryption module?

None

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": {
            "20": "nextcloud.stormcrest.org",
            "1": "nc.stormcrest.org",
            "2": "127.0.0.1",
            "3": "192.168.12.25",
            "4": "localhost"
        },
        "overwriteprotocol": "https",
        "overwritehost": "nc.stormcrest.org",
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "33.0.0.16",
        "overwrite.cli.url": "http:\/\/localhost",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "filelocking.enabled": "true",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "dbindex": 0,
            "password": "***REMOVED SENSITIVE VALUE***",
            "timeout": 1.5
        },
        "htaccess.RewriteBase": "\/",
        "maintenance": false,
        "maintenance_window_start": 8,
        "default_phone_region": "US",
        "mail_smtpmode": "sendmail",
        "mail_smtpdebug": true,
        "mail_sendmailmode": "smtp",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "proxy": "172.16.150.126:9999",
        "proxyexclude": [
            ".stormcrest.org",
            "localhost",
            "LOCALHOST",
            "127.0.0.1",
            "192.168.20.25",
            "192.168.12.25",
            "oods.stormcrest.org"
        ],
        "theme": "",
        "loglevel": 1,
        "ldapProviderFactory": "OCA\\User_LDAP\\LDAPProviderFactory",
        "app_install_overwrite": []
    }
}

List of activated Apps

Enabled:
  - activity: 6.0.0-dev.0
  - admin_audit: 1.23.0
  - admincockpit: 1.2.1
  - app_api: 33.0.0
  - bruteforcesettings: 6.0.0-dev.0
  - checksum: 2.0.3
  - circles: 33.0.0
  - cloud_federation_api: 1.17.0
  - comments: 1.23.0
  - contactsinteraction: 1.14.1
  - cookbook: 0.11.6
  - dashboard: 7.13.0
  - dav: 1.36.0
  - federatedfilesharing: 1.23.0
  - federation: 1.23.0
  - files: 2.5.0
  - files_antivirus: 6.2.0
  - files_downloadlimit: 5.1.0-dev.0
  - files_fulltextsearch: 33.0.0
  - files_pdfviewer: 6.0.0-dev.0
  - files_reminders: 1.6.0
  - files_sharing: 1.25.2
  - files_trashbin: 1.23.0
  - files_versions: 1.26.0
  - firstrunwizard: 6.0.0-dev.0
  - fulltextsearch: 33.0.0
  - fulltextsearch_elasticsearch: 33.0.0
  - groupfolders: 21.0.6
  - groupquota: 0.2.4
  - logreader: 6.0.0
  - lookup_server_connector: 1.21.0
  - music: 3.0.0
  - nextcloud_announcements: 5.0.0
  - notifications: 6.0.0
  - oauth2: 1.21.0
  - onlyoffice: 10.0.0
  - password_policy: 5.0.0-dev.0
  - photos: 6.0.0-dev.0
  - privacy: 5.0.0-dev.0
  - profile: 1.2.0
  - provisioning_api: 1.23.0
  - recommendations: 6.0.0-dev.0
  - related_resources: 4.0.0-dev.0
  - serverinfo: 5.0.0-dev.0
  - settings: 1.16.0
  - sharebymail: 1.23.0
  - support: 5.0.0
  - survey_client: 5.0.0-dev.0
  - suspicious_login: 11.0.0-dev.0
  - systemtags: 1.23.0
  - text: 7.0.0-dev.3
  - theming: 2.8.0
  - twofactor_backupcodes: 1.22.0
  - twofactor_nextcloud_notification: 7.0.0
  - twofactor_totp: 15.0.0-dev.0
  - updatenotification: 1.23.0
  - user_ldap: 1.24.0
  - user_status: 1.13.0
  - viewer: 6.0.0-dev.0
  - weather_status: 1.13.0
  - webhook_listeners: 1.5.0
  - workflowengine: 2.15.0
Disabled:
  - encryption: 2.21.0
  - files_external: 1.25.1
  - files_fulltextsearch_tesseract: 32.0.0 (installed 32.0.0)

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

Nothing really relevant to this issue

Additional info

Software Versions
apache2-bin/noble-updates,noble-security,now 2.4.58-1ubuntu8.11 amd64 [installed,automatic] apache2-data/noble-updates,noble-security,now 2.4.58-1ubuntu8.11 all [installed,automatic] apache2-utils/noble-updates,noble-security,now 2.4.58-1ubuntu8.11 amd64 [installed,automatic] apache2/noble-updates,noble-security,now 2.4.58-1ubuntu8.11 amd64 [installed] libapache2-mod-apparmor/noble-updates,now 4.0.1really4.0.1-0ubuntu0.24.04.5 amd64 [installed] libapache2-mod-evasive/noble,now 1.10.1-6build1 amd64 [installed] libapache2-mod-php8.3/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed,automatic] libapache2-mod-php/noble,now 2:8.3+93ubuntu2 all [installed] libapache2-mod-security2/noble,now 2.9.7-1build3 amd64 [installed] elasticsearch/stable,now 9.3.1 amd64 [installed] mariadb-server-core/noble-updates,now 1:10.11.14-0ubuntu0.24.04.1 amd64 [installed,automatic] mariadb-server/noble-updates,now 1:10.11.14-0ubuntu0.24.04.1 amd64 [installed] php8.3-apcu/noble,now 5.1.22+4.0.11-2ubuntu1 amd64 [installed] php8.3-bcmath/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed,automatic] php8.3-bz2/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed,automatic] php8.3-cli/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed,automatic] php8.3-common/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed] php8.3-curl/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed,automatic] php8.3-fpm/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed] php8.3-gd/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed,automatic] php8.3-gmp/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed,automatic] php8.3-igbinary/noble,now 3.2.13-1ubuntu3 amd64 [installed,automatic] php8.3-imagick/noble,now 3.7.0-4ubuntu3 amd64 [installed,automatic] php8.3-intl/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed,automatic] php8.3-ldap/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed,automatic] php8.3-mbstring/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed,automatic] php8.3-mysql/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed,automatic] php8.3-opcache/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed,automatic] php8.3-readline/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed,automatic] php8.3-redis/noble,now 5.3.7+4.3.0-3ubuntu1 amd64 [installed,automatic] php8.3-xml/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed] php8.3-zip/noble-updates,now 8.3.6-0ubuntu0.24.04.7 amd64 [installed,automatic] redis-server/noble-updates,noble-security,now 5:7.0.15-1ubuntu0.24.04.2 amd64 [installed] redis-tools/noble-updates,noble-security,now 5:7.0.15-1ubuntu0.24.04.2 amd64 [installed,automatic]

[raketax]

Same issue, additionally "ocs/v2.php/apps/serverinfo/api/v1/info?format=json" also doesn't work.
PHP-FPM logs show a bunch of segfaults. (example below)

[14-Mar-2026 16:20:13] WARNING: [pool www] child 24241 exited on signal 11 (SIGSEGV - core dumped) after 3.156554 seconds from start
[14-Mar-2026 16:20:13] NOTICE: [pool www] child 24305 started
[14-Mar-2026 16:21:13] WARNING: [pool www] child 24305 exited on signal 11 (SIGSEGV - core dumped) after 59.676338 seconds from start
[14-Mar-2026 16:21:13] NOTICE: [pool www] child 25536 started

[jonhwood]

My UptimeKuma poll to the healthcheck url raketax just mentioned is how I first started looking into this issue.

[susnux]

Thank you for your report!

This is a problem of the PHP version you are using not of Nextcloud.
If you like you can use the forums to get more help on administration and configuration question: https://help.nextcloud.com/

But this issue there is nothing we can do on our code, you will likely have to open an issue for this either on PHP or on your distribution (Ubuntu?).

[Castiontone]

Had the same issue. Updating to php8.3.30 solved it.

Add the ondrej/php repository.

sudo apt update
sudo apt install -y software-properties-common
sudo LC_ALL=C.UTF-8 add-apt-repository ppa:ondrej/php -y
sudo apt update

Install PHP.

sudo apt install -y php8.3