[GH-ISSUE #6801] SSO: Request to user_info endpoint failed: Server returned invalid response: unexpected HTTP status code #2543

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opened 2026-03-03 02:19:19 +03:00 by kerem · 0 comments

kerem commented

2026-03-03 02:19:19 +03:00

Owner

Originally created by @ChimpGamer on GitHub (Feb 8, 2026).
Original GitHub issue: https://github.com/dani-garcia/vaultwarden/issues/6801

Prerequisites

I have searched the existing Closed AND Open Issues AND Discussions - (There is a discussion about this from last year but without any response)
I have searched and read the documentation

Vaultwarden Support String

Your environment (Generated via diagnostics page)

Vaultwarden version: v1.35.2
Web-vault version: v2025.12.1+build.3
OS/Arch: linux/x86_64
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-Real-IP)
Internet access: true
Internet access via a proxy: false
DNS Check: true
Browser/Server Time Check: true
Server/NTP Time Check: true
Domain Configuration Check: true
HTTPS Check: true
Websocket Check: true
HTTP Response Checks: true

Config & Details (Generated via diagnostics page)

Show Config & Details

Environment settings which are overridden: DOMAIN, SIGNUPS_ALLOWED, ADMIN_TOKEN, SSO_ENABLED, SSO_ONLY, SSO_CLIENT_ID, SSO_CLIENT_SECRET, SSO_AUTHORITY

Config:

{
  "_duo_akey": null,
  "_enable_duo": true,
  "_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": false,
  "dns_prefer_ipv6": false,
  "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": null,
  "experimental_client_feature_flags": "",
  "extended_logging": true,
  "helo_name": null,
  "hibp_api_key": null,
  "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": "Vaultwarden",
  "invitations_allowed": true,
  "ip_header": "X-Real-IP",
  "job_poll_interval_ms": 30000,
  "log_file": null,
  "log_level": "debug",
  "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": false,
  "org_groups_enabled": false,
  "password_hints_allowed": true,
  "password_iterations": 600000,
  "purge_incomplete_sso_auth": "0 20 0 * * *",
  "push_enabled": false,
  "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": false,
  "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": false,
  "signups_verify_resend_limit": 6,
  "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": "***********",
  "smtp_host": null,
  "smtp_password": null,
  "smtp_port": 587,
  "smtp_security": "starttls",
  "smtp_ssl": null,
  "smtp_timeout": 15,
  "smtp_username": null,
  "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": false,
  "sso_pkce": true,
  "sso_scopes": "openid email profile",
  "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

1.35.2

Deployment method

Official Container Image

Custom deployment method

No response

Reverse Proxy

openresty 1.27.1.2

Host/Server Operating System

Linux

Operating System Version

Photon OS 5.0

Clients

Web Vault

Client Version

Edge 144.0.3719.115

Steps To Reproduce

Go to https://vaultwarden/#/login
Enter Email address
Click on 'Use single sign-on'

Expected Result

I'm not sure if ADFS is supported but I expected it to. I'm not sure if this is a bug, configuration issue or simply ADFS being unsupported as SSO server.

Actual Result

I get a browser popup saying "Request to user_info endpoint failed: Server returned invalid response: unexpected HTTP status code"

In the console of docker with debug mode enabled I see:

[2026-02-08 15:22:33.390][vaultwarden::sso_client][ERROR] Request to user_info endpoint failed: Server returned invalid response: unexpected HTTP status code
[2026-02-08 15:22:33.390][response][INFO] (login) POST /identity/connect/token => 400 Bad Request

It does not allow me to login with SSO.

Logs

[2026-02-08 15:22:33.343][request][INFO] POST /identity/connect/token
[2026-02-08 15:22:33.371][reqwest::connect][DEBUG] starting new connection: https://adfs.example.local/
[2026-02-08 15:22:33.373][hyper_util::client::legacy::connect::http][DEBUG] connecting to xxx.xxx.xxx.xxx:443
[2026-02-08 15:22:33.373][hyper_util::client::legacy::connect::http][DEBUG] connected to xxx.xxx.xxx.xxx:443
[2026-02-08 15:22:33.379][hyper_util::client::legacy::pool][DEBUG] pooling idle connection for ("https", adfs.example.local)
[2026-02-08 15:22:33.379][hyper_util::client::legacy::pool][DEBUG] reuse idle connection for ("https", adfs.example.local)
[2026-02-08 15:22:33.380][hyper_util::client::legacy::pool][DEBUG] pooling idle connection for ("https", adfs.example.local)
[2026-02-08 15:22:33.380][hyper_util::client::legacy::pool][DEBUG] reuse idle connection for ("https", adfs.example.local)
[2026-02-08 15:22:33.387][hyper_util::client::legacy::pool][DEBUG] pooling idle connection for ("https", adfs.example.local)
[2026-02-08 15:22:33.388][hyper_util::client::legacy::pool][DEBUG] reuse idle connection for ("https", adfs.example.local)
[2026-02-08 15:22:33.390][hyper_util::client::legacy::pool][DEBUG] pooling idle connection for ("https", adfs.example.local)
[2026-02-08 15:22:33.390][vaultwarden::sso_client][ERROR] Request to user_info endpoint failed: Server returned invalid response: unexpected HTTP status code
[2026-02-08 15:22:33.390][response][INFO] (login) POST /identity/connect/token => 400 Bad Request

Screenshots or Videos

Additional Context

No response

Originally created by @ChimpGamer on GitHub (Feb 8, 2026). Original GitHub issue: https://github.com/dani-garcia/vaultwarden/issues/6801 ### 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=) - (There is a discussion about this from last year but without any response) - [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: v1.35.2 * Web-vault version: v2025.12.1+build.3 * OS/Arch: linux/x86_64 * 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-Real-IP) * Internet access: true * Internet access via a proxy: false * DNS Check: true * Browser/Server Time Check: true * Server/NTP Time Check: true * Domain Configuration Check: true * HTTPS Check: true * Websocket Check: true * HTTP Response Checks: true ### Config & Details (Generated via diagnostics page) <details><summary>Show Config & Details</summary> **Environment settings which are overridden:** DOMAIN, SIGNUPS_ALLOWED, ADMIN_TOKEN, SSO_ENABLED, SSO_ONLY, SSO_CLIENT_ID, SSO_CLIENT_SECRET, SSO_AUTHORITY **Config:** ```json { "_duo_akey": null, "_enable_duo": true, "_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": false, "dns_prefer_ipv6": false, "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": null, "experimental_client_feature_flags": "", "extended_logging": true, "helo_name": null, "hibp_api_key": null, "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": "Vaultwarden", "invitations_allowed": true, "ip_header": "X-Real-IP", "job_poll_interval_ms": 30000, "log_file": null, "log_level": "debug", "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": false, "org_groups_enabled": false, "password_hints_allowed": true, "password_iterations": 600000, "purge_incomplete_sso_auth": "0 20 0 * * *", "push_enabled": false, "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": false, "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": false, "signups_verify_resend_limit": 6, "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": "***********", "smtp_host": null, "smtp_password": null, "smtp_port": 587, "smtp_security": "starttls", "smtp_ssl": null, "smtp_timeout": 15, "smtp_username": null, "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": false, "sso_pkce": true, "sso_scopes": "openid email profile", "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 1.35.2 ### Deployment method Official Container Image ### Custom deployment method _No response_ ### Reverse Proxy openresty 1.27.1.2 ### Host/Server Operating System Linux ### Operating System Version Photon OS 5.0 ### Clients Web Vault ### Client Version Edge 144.0.3719.115 ### Steps To Reproduce 1. Go to https://vaultwarden/#/login 2. Enter Email address 3. Click on 'Use single sign-on' ### Expected Result I'm not sure if ADFS is supported but I expected it to. I'm not sure if this is a bug, configuration issue or simply ADFS being unsupported as SSO server. ### Actual Result I get a browser popup saying "Request to user_info endpoint failed: Server returned invalid response: unexpected HTTP status code" In the console of docker with debug mode enabled I see: ``` [2026-02-08 15:22:33.390][vaultwarden::sso_client][ERROR] Request to user_info endpoint failed: Server returned invalid response: unexpected HTTP status code [2026-02-08 15:22:33.390][response][INFO] (login) POST /identity/connect/token => 400 Bad Request ``` It does not allow me to login with SSO. ### Logs ```text [2026-02-08 15:22:33.343][request][INFO] POST /identity/connect/token [2026-02-08 15:22:33.371][reqwest::connect][DEBUG] starting new connection: https://adfs.example.local/ [2026-02-08 15:22:33.373][hyper_util::client::legacy::connect::http][DEBUG] connecting to xxx.xxx.xxx.xxx:443 [2026-02-08 15:22:33.373][hyper_util::client::legacy::connect::http][DEBUG] connected to xxx.xxx.xxx.xxx:443 [2026-02-08 15:22:33.379][hyper_util::client::legacy::pool][DEBUG] pooling idle connection for ("https", adfs.example.local) [2026-02-08 15:22:33.379][hyper_util::client::legacy::pool][DEBUG] reuse idle connection for ("https", adfs.example.local) [2026-02-08 15:22:33.380][hyper_util::client::legacy::pool][DEBUG] pooling idle connection for ("https", adfs.example.local) [2026-02-08 15:22:33.380][hyper_util::client::legacy::pool][DEBUG] reuse idle connection for ("https", adfs.example.local) [2026-02-08 15:22:33.387][hyper_util::client::legacy::pool][DEBUG] pooling idle connection for ("https", adfs.example.local) [2026-02-08 15:22:33.388][hyper_util::client::legacy::pool][DEBUG] reuse idle connection for ("https", adfs.example.local) [2026-02-08 15:22:33.390][hyper_util::client::legacy::pool][DEBUG] pooling idle connection for ("https", adfs.example.local) [2026-02-08 15:22:33.390][vaultwarden::sso_client][ERROR] Request to user_info endpoint failed: Server returned invalid response: unexpected HTTP status code [2026-02-08 15:22:33.390][response][INFO] (login) POST /identity/connect/token => 400 Bad Request ``` ### Screenshots or Videos <img width="1001" height="947" alt="Image" src="https://github.com/user-attachments/assets/86ef5533-584f-43cb-8394-f5cb594f5adb" /> ### Additional Context _No response_