Cannot login on Android with Duo 2FA activated #337

New Issue

MrUnknownDE · 2026-04-05T20:55:48+02:00

MrUnknownDE commented

2026-04-05 20:55:48 +02:00

Originally created by @esackbauer on 10/5/2025

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
Web-vault version: v2025.7.0
OS/Arch: linux/x86_64
Running within a container: true (Base: Debian)
Database type: SQLite
Database version: 3.50.2
Uses config.json: false
Uses a reverse proxy: true
IP Header check: true (X-Forwarded-For)
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

Config:

{
  "_duo_akey": "***",
  "_enable_duo": true,
  "_enable_email_2fa": true,
  "_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_max_conns": 10,
  "database_timeout": 30,
  "database_url": "***************",
  "db_connection_retries": 15,
  "disable_2fa_remember": false,
  "disable_admin_token": false,
  "disable_icon_download": 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-Forwarded-For",
  "job_poll_interval_ms": 30000,
  "log_file": null,
  "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": false,
  "org_groups_enabled": false,
  "password_hints_allowed": true,
  "password_iterations": 600000,
  "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": 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": "Vaultwarden",
  "smtp_host": "***************",
  "smtp_password": null,
  "smtp_port": 25,
  "smtp_security": "starttls",
  "smtp_ssl": null,
  "smtp_timeout": 15,
  "smtp_username": null,
  "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

1.34.3

Deployment method

Official Container Image

Custom deployment method

No response

Reverse Proxy

Sophos Firewall

Host/Server Operating System

Linux

Operating System Version

Debian 12

Clients

Android

Client Version

2025.9.0

Steps To Reproduce

Install app
Enter homeserver and email address
Enter master password
Duo will be displayed, after "continue" Duo will be invoked and you need to confirm in Duo the login.
The pop up window in the browser still shows "Bitwarden" and a dotted circle which spins forever.

Expected Result

Pop up browser window will disappear (or message that window can be closed) and Bitwarden will open the vault

Actual Result

browser window showing spinning dots forever

Logs

/--------------------------------------------------------------------\

|                        Starting Vaultwarden                        |

|                           Version 1.34.3                           |

|--------------------------------------------------------------------|

| This is an *unofficial* Bitwarden implementation, DO NOT use the   |

| official channels to report bugs/features, regardless of client.   |

| Send usage/configuration questions or feature requests to:         |

|   https://github.com/dani-garcia/vaultwarden/discussions or        |

|   https://vaultwarden.discourse.group/                             |

| Report suspected bugs/issues in the software itself at:            |

|   https://github.com/dani-garcia/vaultwarden/issues/new            |

\--------------------------------------------------------------------/

[INFO] Using saved config from `data/config.json` for configuration.

[2025-10-05 10:26:06.077][start][INFO] Rocket has launched from http://0.0.0.0:80

[2025-10-05 10:27:57.843][request][INFO] POST /identity/accounts/prelogin

[2025-10-05 10:27:57.845][response][INFO] (prelogin) POST /identity/accounts/prelogin => 200 OK

[2025-10-05 10:27:58.367][request][INFO] POST /identity/connect/token

[2025-10-05 10:27:59.239][error][ERROR] 2FA token not provided

[2025-10-05 10:27:59.239][response][INFO] (login) POST /identity/connect/token => 400 Bad Request

Screenshots or Videos

No response

Additional Context

It seems from the logs, that immediately after Duo 2FA is invoked, it is assumed that an invalid token was presented. I had the chance to allow the login in Duo app after a couple of seconds, so that error must have happened before that:

[2025-10-05 10:27:58.367][request][INFO] POST /identity/connect/token
[2025-10-05 10:27:59.239][error][ERROR] 2FA token not provided

No errors on the reverse proxy log from Sophos Firewall.
Tested with Brave Browser and Chrome on Android device.
Nothing was changed on Duo or reverse proxy side, it was working with a former Bitwarden/Vaultwarden version. Did not login for a long time.

*Originally created by @esackbauer on 10/5/2025* ### 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 * Web-vault version: v2025.7.0 * OS/Arch: linux/x86_64 * Running within a container: true (Base: Debian) * Database type: SQLite * Database version: 3.50.2 * Uses config.json: false * Uses a reverse proxy: true * IP Header check: true (X-Forwarded-For) * 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> **Config:** ```json { "_duo_akey": "***", "_enable_duo": true, "_enable_email_2fa": true, "_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_max_conns": 10, "database_timeout": 30, "database_url": "***************", "db_connection_retries": 15, "disable_2fa_remember": false, "disable_admin_token": false, "disable_icon_download": 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-Forwarded-For", "job_poll_interval_ms": 30000, "log_file": null, "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": false, "org_groups_enabled": false, "password_hints_allowed": true, "password_iterations": 600000, "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": 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": "Vaultwarden", "smtp_host": "***************", "smtp_password": null, "smtp_port": 25, "smtp_security": "starttls", "smtp_ssl": null, "smtp_timeout": 15, "smtp_username": null, "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 1.34.3 ### Deployment method Official Container Image ### Custom deployment method _No response_ ### Reverse Proxy Sophos Firewall ### Host/Server Operating System Linux ### Operating System Version Debian 12 ### Clients Android ### Client Version 2025.9.0 ### Steps To Reproduce 1. Install app 2. Enter homeserver and email address 3. Enter master password 4. Duo will be displayed, after "continue" Duo will be invoked and you need to confirm in Duo the login. 5. The pop up window in the browser still shows "Bitwarden" and a dotted circle which spins forever. ### Expected Result Pop up browser window will disappear (or message that window can be closed) and Bitwarden will open the vault ### Actual Result browser window showing spinning dots forever ### Logs ```text /--------------------------------------------------------------------\ | Starting Vaultwarden | | Version 1.34.3 | |--------------------------------------------------------------------| | This is an *unofficial* Bitwarden implementation, DO NOT use the | | official channels to report bugs/features, regardless of client. | | Send usage/configuration questions or feature requests to: | | https://github.com/dani-garcia/vaultwarden/discussions or | | https://vaultwarden.discourse.group/ | | Report suspected bugs/issues in the software itself at: | | https://github.com/dani-garcia/vaultwarden/issues/new | \--------------------------------------------------------------------/ [INFO] Using saved config from `data/config.json` for configuration. [2025-10-05 10:26:06.077][start][INFO] Rocket has launched from http://0.0.0.0:80 [2025-10-05 10:27:57.843][request][INFO] POST /identity/accounts/prelogin [2025-10-05 10:27:57.845][response][INFO] (prelogin) POST /identity/accounts/prelogin => 200 OK [2025-10-05 10:27:58.367][request][INFO] POST /identity/connect/token [2025-10-05 10:27:59.239][error][ERROR] 2FA token not provided [2025-10-05 10:27:59.239][response][INFO] (login) POST /identity/connect/token => 400 Bad Request ``` ### Screenshots or Videos _No response_ ### Additional Context It seems from the logs, that immediately after Duo 2FA is invoked, it is assumed that an invalid token was presented. I had the chance to allow the login in Duo app after a couple of seconds, so that error must have happened before that: ``` [2025-10-05 10:27:58.367][request][INFO] POST /identity/connect/token [2025-10-05 10:27:59.239][error][ERROR] 2FA token not provided ``` No errors on the reverse proxy log from Sophos Firewall. Tested with Brave Browser and Chrome on Android device. Nothing was changed on Duo or reverse proxy side, it was working with a former Bitwarden/Vaultwarden version. Did not login for a long time.

MrUnknownDE closed this issue

2026-04-05 20:55:48 +02:00

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Reference: github/vaultwarden#337