SSO fails in IPv6-only environments #346

New Issue

MrUnknownDE · 2026-04-05T20:57:39+02:00

MrUnknownDE commented

2026-04-05 20:57:39 +02:00

Originally created by @devksingh4 on 9/23/2025

Prerequisites

I have searched the existing Closed AND Open Issues AND Discussions
I have searched and read the documentation

Vaultwarden Support String

Your environment (Generated via diagnostics page)

Vaultwarden version: v1.34.3-a2ad1dc7
Web-vault version: v2025.8.0
OS/Arch: linux/aarch64
Running within a container: true (Base: Debian)
Database type: SQLite
Database version: 3.50.2
Uses config.json: true
Uses a reverse proxy: true
IP Header check: true (X-Forwarded-For)
Internet access: true
Internet access via a proxy: false
DNS Check: true
TZ environment: America/Chicago
Browser/Server Time Check: true
Server/NTP Time Check: true
Domain Configuration Check: true
HTTPS Check: true
Websocket Check: false
HTTP Response Checks: true

Config & Details (Generated via diagnostics page)

Show Config & Details

Environment settings which are overridden: DOMAIN, SIGNUPS_ALLOWED, SHOW_PASSWORD_HINT, ADMIN_TOKEN, IP_HEADER, SSO_ENABLED, SSO_ONLY, SSO_SIGNUPS_MATCH_EMAIL, SSO_CLIENT_ID, SSO_CLIENT_SECRET, SSO_AUTHORITY, SSO_SCOPES, SMTP_HOST, SMTP_SECURITY, SMTP_PORT, SMTP_FROM, SMTP_FROM_NAME, SMTP_USERNAME, SMTP_PASSWORD

Config:

{
  "_duo_akey": null,
  "_enable_duo": false,
  "_enable_email_2fa": false,
  "_enable_smtp": true,
  "_enable_yubico": true,
  "_icon_service_csp": "",
  "_icon_service_url": "",
  "_ip_header_enabled": true,
  "_max_note_size": 10000,
  "_smtp_img_src": "***:",
  "admin_ratelimit_max_burst": 3,
  "admin_ratelimit_seconds": 300,
  "admin_session_lifetime": 20,
  "admin_token": "***",
  "allowed_connect_src": "",
  "allowed_iframe_ancestors": "",
  "attachments_folder": "data/attachments",
  "auth_request_purge_schedule": "30 * * * * *",
  "authenticator_disable_time_drift": false,
  "data_folder": "data",
  "database_conn_init": "",
  "database_idle_timeout": 600,
  "database_max_conns": 10,
  "database_min_conns": 2,
  "database_timeout": 30,
  "database_url": "***************",
  "db_connection_retries": 15,
  "disable_2fa_remember": false,
  "disable_admin_token": false,
  "disable_icon_download": true,
  "domain": "*****://**********************",
  "domain_origin": "*****://**********************",
  "domain_path": "",
  "domain_set": true,
  "duo_context_purge_schedule": "30 * * * * *",
  "duo_host": null,
  "duo_ikey": null,
  "duo_skey": null,
  "duo_use_iframe": false,
  "email_2fa_auto_fallback": false,
  "email_2fa_enforce_on_verified_invite": false,
  "email_attempts_limit": 3,
  "email_change_allowed": true,
  "email_expiration_time": 600,
  "email_token_size": 6,
  "emergency_access_allowed": true,
  "emergency_notification_reminder_schedule": "0 3 * * * *",
  "emergency_request_timeout_schedule": "0 7 * * * *",
  "enable_db_wal": true,
  "enable_websocket": true,
  "enforce_single_org_with_reset_pw_policy": false,
  "event_cleanup_schedule": "0 10 0 * * *",
  "events_days_retain": 90,
  "experimental_client_feature_flags": "",
  "extended_logging": true,
  "helo_name": null,
  "hibp_api_key": "***",
  "http_request_block_non_global_ips": true,
  "http_request_block_regex": null,
  "icon_blacklist_non_global_ips": true,
  "icon_blacklist_regex": null,
  "icon_cache_folder": "data/icon_cache",
  "icon_cache_negttl": 259200,
  "icon_cache_ttl": 2592000,
  "icon_download_timeout": 10,
  "icon_redirect_code": 302,
  "icon_service": "internal",
  "incomplete_2fa_schedule": "30 * * * * *",
  "incomplete_2fa_time_limit": 3,
  "increase_note_size_limit": false,
  "invitation_expiration_hours": 120,
  "invitation_org_name": "ACM @ UIUC Vaultwarden",
  "invitations_allowed": true,
  "ip_header": "X-Forwarded-For",
  "job_poll_interval_ms": 30000,
  "log_file": "/data/bitwarden.log",
  "log_level": "info",
  "log_timestamp_format": "%Y-%m-%d %H:%M:%S.%3f",
  "login_ratelimit_max_burst": 10,
  "login_ratelimit_seconds": 60,
  "org_attachment_limit": null,
  "org_creation_users": "",
  "org_events_enabled": true,
  "org_groups_enabled": false,
  "password_hints_allowed": true,
  "password_iterations": 600000,
  "purge_incomplete_sso_nonce": "0 20 0 * * *",
  "push_enabled": true,
  "push_identity_uri": "https://identity.bitwarden.com",
  "push_installation_id": "***",
  "push_installation_key": "***",
  "push_relay_uri": "https://push.bitwarden.com",
  "reload_templates": false,
  "require_device_email": true,
  "rsa_key_filename": "data/rsa_key",
  "send_purge_schedule": "0 5 * * * *",
  "sendmail_command": null,
  "sends_allowed": true,
  "sends_folder": "data/sends",
  "show_password_hint": false,
  "signups_allowed": true,
  "signups_domains_whitelist": "************,****************",
  "signups_verify": true,
  "signups_verify_resend_limit": 4,
  "signups_verify_resend_time": 3600,
  "smtp_accept_invalid_certs": false,
  "smtp_accept_invalid_hostnames": false,
  "smtp_auth_mechanism": null,
  "smtp_debug": false,
  "smtp_embed_images": true,
  "smtp_explicit_tls": null,
  "smtp_from": "************************",
  "smtp_from_name": "ACM @ UIUC Vault",
  "smtp_host": "**********************************",
  "smtp_password": "***",
  "smtp_port": 465,
  "smtp_security": "force_tls",
  "smtp_ssl": null,
  "smtp_timeout": 15,
  "smtp_username": "********************",
  "sso_allow_unknown_email_verification": false,
  "sso_audience_trusted": null,
  "sso_auth_only_not_session": false,
  "sso_authority": "*****://*******************************************************************",
  "sso_authorize_extra_params": "",
  "sso_callback_path": "*****://***************************************************",
  "sso_client_cache_expiration": 0,
  "sso_client_id": "************************************",
  "sso_client_secret": "***",
  "sso_debug_tokens": false,
  "sso_enabled": true,
  "sso_master_password_policy": null,
  "sso_only": true,
  "sso_pkce": true,
  "sso_scopes": "openid profile offline_access User.Read",
  "sso_signups_match_email": true,
  "templates_folder": "data/templates",
  "tmp_folder": "data/tmp",
  "trash_auto_delete_days": null,
  "trash_purge_schedule": "0 5 0 * * *",
  "use_sendmail": false,
  "use_syslog": false,
  "user_attachment_limit": null,
  "user_send_limit": null,
  "web_vault_enabled": true,
  "web_vault_folder": "web-vault/",
  "yubico_client_id": null,
  "yubico_secret_key": null,
  "yubico_server": null
}

Vaultwarden Build Version

v1.34.3-a2ad1dc7

Deployment method

Official Container Image

Custom deployment method

No response

Reverse Proxy

Caddy 2.1

Host/Server Operating System

Linux

Operating System Version

Ubuntu 24.04

Clients

Web Vault

Client Version

No response

Steps To Reproduce

Deploy to AWS EC2 vm (or similar)
Disable IPv4 access (IPv6 only).
Enable SSO with Entra ID
Click "Use single sign-on" in web vault.

Expected Result

The sign on should succeed and present me with the unlock screen.

Actual Result

The SSO hangs forever.

Logs

Screenshots or Videos

Additional Context

I am using Entra ID for SSO. I have validated that other docker containers on that host are able to use IPv6. login.microsoftonline.com supports IPv6 as well.

*Originally created by @devksingh4 on 9/23/2025* ### Prerequisites - [x] I have searched the existing **Closed _AND_ Open** [Issues](https://github.com/dani-garcia/vaultwarden/issues?q=is%3Aissue%20) **_AND_** [Discussions](https://github.com/dani-garcia/vaultwarden/discussions?discussions_q=) - [x] I have searched and read the [documentation](https://github.com/dani-garcia/vaultwarden/wiki/) ### Vaultwarden Support String ### Your environment (Generated via diagnostics page) * Vaultwarden version: v1.34.3-a2ad1dc7 * Web-vault version: v2025.8.0 * OS/Arch: linux/aarch64 * Running within a container: true (Base: Debian) * Database type: SQLite * Database version: 3.50.2 * Uses config.json: true * Uses a reverse proxy: true * IP Header check: true (X-Forwarded-For) * Internet access: true * Internet access via a proxy: false * DNS Check: true * TZ environment: America/Chicago * Browser/Server Time Check: true * Server/NTP Time Check: true * Domain Configuration Check: true * HTTPS Check: true * Websocket Check: false * HTTP Response Checks: true ### Config & Details (Generated via diagnostics page) <details><summary>Show Config & Details</summary> **Environment settings which are overridden:** DOMAIN, SIGNUPS_ALLOWED, SHOW_PASSWORD_HINT, ADMIN_TOKEN, IP_HEADER, SSO_ENABLED, SSO_ONLY, SSO_SIGNUPS_MATCH_EMAIL, SSO_CLIENT_ID, SSO_CLIENT_SECRET, SSO_AUTHORITY, SSO_SCOPES, SMTP_HOST, SMTP_SECURITY, SMTP_PORT, SMTP_FROM, SMTP_FROM_NAME, SMTP_USERNAME, SMTP_PASSWORD **Config:** ```json { "_duo_akey": null, "_enable_duo": false, "_enable_email_2fa": false, "_enable_smtp": true, "_enable_yubico": true, "_icon_service_csp": "", "_icon_service_url": "", "_ip_header_enabled": true, "_max_note_size": 10000, "_smtp_img_src": "***:", "admin_ratelimit_max_burst": 3, "admin_ratelimit_seconds": 300, "admin_session_lifetime": 20, "admin_token": "***", "allowed_connect_src": "", "allowed_iframe_ancestors": "", "attachments_folder": "data/attachments", "auth_request_purge_schedule": "30 * * * * *", "authenticator_disable_time_drift": false, "data_folder": "data", "database_conn_init": "", "database_idle_timeout": 600, "database_max_conns": 10, "database_min_conns": 2, "database_timeout": 30, "database_url": "***************", "db_connection_retries": 15, "disable_2fa_remember": false, "disable_admin_token": false, "disable_icon_download": true, "domain": "*****://**********************", "domain_origin": "*****://**********************", "domain_path": "", "domain_set": true, "duo_context_purge_schedule": "30 * * * * *", "duo_host": null, "duo_ikey": null, "duo_skey": null, "duo_use_iframe": false, "email_2fa_auto_fallback": false, "email_2fa_enforce_on_verified_invite": false, "email_attempts_limit": 3, "email_change_allowed": true, "email_expiration_time": 600, "email_token_size": 6, "emergency_access_allowed": true, "emergency_notification_reminder_schedule": "0 3 * * * *", "emergency_request_timeout_schedule": "0 7 * * * *", "enable_db_wal": true, "enable_websocket": true, "enforce_single_org_with_reset_pw_policy": false, "event_cleanup_schedule": "0 10 0 * * *", "events_days_retain": 90, "experimental_client_feature_flags": "", "extended_logging": true, "helo_name": null, "hibp_api_key": "***", "http_request_block_non_global_ips": true, "http_request_block_regex": null, "icon_blacklist_non_global_ips": true, "icon_blacklist_regex": null, "icon_cache_folder": "data/icon_cache", "icon_cache_negttl": 259200, "icon_cache_ttl": 2592000, "icon_download_timeout": 10, "icon_redirect_code": 302, "icon_service": "internal", "incomplete_2fa_schedule": "30 * * * * *", "incomplete_2fa_time_limit": 3, "increase_note_size_limit": false, "invitation_expiration_hours": 120, "invitation_org_name": "ACM @ UIUC Vaultwarden", "invitations_allowed": true, "ip_header": "X-Forwarded-For", "job_poll_interval_ms": 30000, "log_file": "/data/bitwarden.log", "log_level": "info", "log_timestamp_format": "%Y-%m-%d %H:%M:%S.%3f", "login_ratelimit_max_burst": 10, "login_ratelimit_seconds": 60, "org_attachment_limit": null, "org_creation_users": "", "org_events_enabled": true, "org_groups_enabled": false, "password_hints_allowed": true, "password_iterations": 600000, "purge_incomplete_sso_nonce": "0 20 0 * * *", "push_enabled": true, "push_identity_uri": "https://identity.bitwarden.com", "push_installation_id": "***", "push_installation_key": "***", "push_relay_uri": "https://push.bitwarden.com", "reload_templates": false, "require_device_email": true, "rsa_key_filename": "data/rsa_key", "send_purge_schedule": "0 5 * * * *", "sendmail_command": null, "sends_allowed": true, "sends_folder": "data/sends", "show_password_hint": false, "signups_allowed": true, "signups_domains_whitelist": "************,****************", "signups_verify": true, "signups_verify_resend_limit": 4, "signups_verify_resend_time": 3600, "smtp_accept_invalid_certs": false, "smtp_accept_invalid_hostnames": false, "smtp_auth_mechanism": null, "smtp_debug": false, "smtp_embed_images": true, "smtp_explicit_tls": null, "smtp_from": "************************", "smtp_from_name": "ACM @ UIUC Vault", "smtp_host": "**********************************", "smtp_password": "***", "smtp_port": 465, "smtp_security": "force_tls", "smtp_ssl": null, "smtp_timeout": 15, "smtp_username": "********************", "sso_allow_unknown_email_verification": false, "sso_audience_trusted": null, "sso_auth_only_not_session": false, "sso_authority": "*****://*******************************************************************", "sso_authorize_extra_params": "", "sso_callback_path": "*****://***************************************************", "sso_client_cache_expiration": 0, "sso_client_id": "************************************", "sso_client_secret": "***", "sso_debug_tokens": false, "sso_enabled": true, "sso_master_password_policy": null, "sso_only": true, "sso_pkce": true, "sso_scopes": "openid profile offline_access User.Read", "sso_signups_match_email": true, "templates_folder": "data/templates", "tmp_folder": "data/tmp", "trash_auto_delete_days": null, "trash_purge_schedule": "0 5 0 * * *", "use_sendmail": false, "use_syslog": false, "user_attachment_limit": null, "user_send_limit": null, "web_vault_enabled": true, "web_vault_folder": "web-vault/", "yubico_client_id": null, "yubico_secret_key": null, "yubico_server": null } ``` </details> ### Vaultwarden Build Version v1.34.3-a2ad1dc7 ### Deployment method Official Container Image ### Custom deployment method _No response_ ### Reverse Proxy Caddy 2.1 ### Host/Server Operating System Linux ### Operating System Version Ubuntu 24.04 ### Clients Web Vault ### Client Version _No response_ ### Steps To Reproduce 1. Deploy to AWS EC2 vm (or similar) 2. Disable IPv4 access (IPv6 only). 3. Enable SSO with Entra ID 4. Click "Use single sign-on" in web vault. ### Expected Result The sign on should succeed and present me with the unlock screen. ### Actual Result The SSO hangs forever. ### Logs ```text ``` ### Screenshots or Videos <img width="553" height="426" alt="Image" src="https://github.com/user-attachments/assets/7232eefb-d031-47ed-b4a6-559cd6a92449" /> ### Additional Context I am using Entra ID for SSO. I have validated that other docker containers on that host are able to use IPv6. login.microsoftonline.com supports IPv6 as well.

MrUnknownDE closed this issue

2026-04-05 20:57:39 +02:00

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Reference: github/vaultwarden#346