KnownDevice failed: "X-Request-Email value failed to decode as base64url" #55

New Issue

MrUnknownDE · 2026-04-05T20:29:13+02:00

MrUnknownDE commented

2026-04-05 20:29:13 +02:00

Originally created by @ttionya on 3/17/2026

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: v1.35.4
Web-vault version: v2026.1.1
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": null,
  "_enable_duo": false,
  "_enable_email_2fa": true,
  "_enable_smtp": true,
  "_enable_yubico": false,
  "_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": "PPY",
  "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": 200000,
  "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": true,
  "signups_allowed": false,
  "signups_domains_whitelist": "",
  "signups_verify": true,
  "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": "*************",
  "smtp_password": "***",
  "smtp_port": 587,
  "smtp_security": "starttls",
  "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": false,
  "sso_master_password_policy": null,
  "sso_only": false,
  "sso_pkce": true,
  "sso_scopes": "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

1.35.4

Deployment method

Official Container Image

Custom deployment method

No response

Reverse Proxy

Nginx 1.29.4

Host/Server Operating System

Linux

Operating System Version

Debian 12

Clients

Desktop

Client Version

2026.2.1

Steps To Reproduce

When opening the browser extension to login or clicking continue in the client, the log in with device button does not appear. An error is included in the logs.

Expected Result

The /api/devices/knowndevice endpoint works correctly.

Actual Result

/api/devices/knowndevice response 400 Bad Request.

Over the past few days, I have found that I cannot log in with device on the browser extension. After checking the client, the device login works fine on version 2025.12.1, and the related API has no errors. However, after upgrading to the latest 2026.2.1 version, the API becomes abnormal, which prevents device login from working properly.

Logs

vaultwarden-1  | [2026-03-17 04:36:57.766][vaultwarden::api::core::accounts::_][WARN] Request guard `KnownDevice` failed: "X-Request-Email value failed to decode as base64url".
vaultwarden-1  | [2026-03-17 04:36:57.766][response][INFO] (get_known_device) GET /api/devices/knowndevice => 400 Bad Request
vaultwarden-1  | [2026-03-17 04:37:14.893][request][INFO] GET /api/devices/knowndevice
vaultwarden-1  | [2026-03-17 04:37:14.893][vaultwarden::api::core::accounts::_][WARN] Request guard `KnownDevice` failed: "X-Request-Email value failed to decode as base64url".
vaultwarden-1  | [2026-03-17 04:37:14.893][response][INFO] (get_known_device) GET /api/devices/knowndevice => 400 Bad Request

Screenshots or Videos

No response

Additional Context

No response

*Originally created by @ttionya on 3/17/2026* ### 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: v1.35.4 * Web-vault version: v2026.1.1 * 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": null, "_enable_duo": false, "_enable_email_2fa": true, "_enable_smtp": true, "_enable_yubico": false, "_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": "PPY", "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": 200000, "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": true, "signups_allowed": false, "signups_domains_whitelist": "", "signups_verify": true, "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": "*************", "smtp_password": "***", "smtp_port": 587, "smtp_security": "starttls", "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": false, "sso_master_password_policy": null, "sso_only": false, "sso_pkce": true, "sso_scopes": "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 1.35.4 ### Deployment method Official Container Image ### Custom deployment method _No response_ ### Reverse Proxy Nginx 1.29.4 ### Host/Server Operating System Linux ### Operating System Version Debian 12 ### Clients Desktop ### Client Version 2026.2.1 ### Steps To Reproduce When opening the browser extension to login or clicking `continue` in the client, the `log in with device` button does not appear. An error is included in the logs. ### Expected Result The `/api/devices/knowndevice` endpoint works correctly. ### Actual Result `/api/devices/knowndevice` response 400 Bad Request. Over the past few days, I have found that I cannot log in with device on the browser extension. After checking the client, the device login works fine on version 2025.12.1, and the related API has no errors. However, after upgrading to the latest 2026.2.1 version, the API becomes abnormal, which prevents device login from working properly. ### Logs ```text vaultwarden-1 | [2026-03-17 04:36:57.766][vaultwarden::api::core::accounts::_][WARN] Request guard `KnownDevice` failed: "X-Request-Email value failed to decode as base64url". vaultwarden-1 | [2026-03-17 04:36:57.766][response][INFO] (get_known_device) GET /api/devices/knowndevice => 400 Bad Request vaultwarden-1 | [2026-03-17 04:37:14.893][request][INFO] GET /api/devices/knowndevice vaultwarden-1 | [2026-03-17 04:37:14.893][vaultwarden::api::core::accounts::_][WARN] Request guard `KnownDevice` failed: "X-Request-Email value failed to decode as base64url". vaultwarden-1 | [2026-03-17 04:37:14.893][response][INFO] (get_known_device) GET /api/devices/knowndevice => 400 Bad Request ``` ### Screenshots or Videos _No response_ ### Additional Context _No response_

MrUnknownDE closed this issue

2026-04-05 20:29:13 +02:00

MrUnknownDE added the bug bug bug bug bug bug bug bug bug bug bug bug bug bug labels 2026-04-05 20:29:14 +02:00

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Reference: github/vaultwarden#55