Request guard KnownDevice failed: "X-Request-Email value failed to decode as base64url" #1673

New Issue

MrUnknownDE · 2026-04-06T02:10:58+02:00

MrUnknownDE commented

2026-04-06 02:10:58 +02:00

Originally created by @NoseyNick on 3/30/2023

Subject of the issue

Request guard KnownDevice failed: "X-Request-Email value failed to decode as base64url".

Web vault works fine (2023.3.0)

Android app (2023.3.2 - latest?) gives "we were unable to process your request, please try again or contact us".

Firefox addon (2023.3.0 - latest? but also 2023.2.1 before that) gives whirly wait-spinner thing.

... but only for ONE USER. Six other users work fine. Log says:

[2023-03-29 23:46:25.766][request][INFO] GET /vault/api/devices/knowndevice
[2023-03-29 23:46:25.766][vaultwarden::api::core::accounts::_][WARN] Request guard `KnownDevice` failed: "X-Request-Email value failed to decode as base64url".
[2023-03-29 23:46:25.766][rocket::server::_][WARN] No 400 catcher registered. Using Rocket default.
[2023-03-29 23:46:25.766][response][INFO] (get_known_device) GET /vault/api/devices/knowndevice => 400 Bad Request

Deployment environment

Your environment (Generated via diagnostics page)

Vaultwarden version: v1.28.0
Web-vault version: v2023.3.0b
OS/Arch: linux/x86_64
Running within Docker: false (Base: Not applicable)
Environment settings overridden: false
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
Database type: SQLite
Database version: 3.39.2
Clients used:
Reverse proxy and version:
Other relevant information:

Config (Generated via diagnostics page)

Show Running Config

Environment settings which are overridden:

{
  "_duo_akey": null,
  "_enable_duo": false,
  "_enable_email_2fa": true,
  "_enable_smtp": true,
  "_enable_yubico": true,
  "_icon_service_csp": "",
  "_icon_service_url": "",
  "_ip_header_enabled": true,
  "_smtp_img_src": "cid:",
  "admin_ratelimit_max_burst": 3,
  "admin_ratelimit_seconds": 300,
  "admin_session_lifetime": 20,
  "admin_token": "***",
  "allowed_iframe_ancestors": "",
  "attachments_folder": "data/attachments",
  "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_host": null,
  "duo_ikey": null,
  "duo_skey": null,
  "email_attempts_limit": 3,
  "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,
  "event_cleanup_schedule": "0 10 0 * * *",
  "events_days_retain": null,
  "extended_logging": true,
  "helo_name": null,
  "hibp_api_key": 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,
  "invitation_expiration_hours": 120,
  "invitation_org_name": "NoseyNick's Vault",
  "invitations_allowed": true,
  "ip_header": "X-Real-IP",
  "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": 100000,
  "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": 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": "NoseyNick's Vault",
  "smtp_host": "*********",
  "smtp_password": null,
  "smtp_port": 25,
  "smtp_security": "off",
  "smtp_ssl": null,
  "smtp_timeout": 15,
  "smtp_username": null,
  "templates_folder": "data/templates",
  "tmp_folder": "data/tmp",
  "trash_auto_delete_days": 14,
  "trash_purge_schedule": "0 5 0 * * *",
  "use_sendmail": false,
  "use_syslog": false,
  "user_attachment_limit": null,
  "web_vault_enabled": true,
  "web_vault_folder": "web-vault/",
  "websocket_address": "0.0.0.0",
  "websocket_enabled": false,
  "websocket_port": 3012,
  "yubico_client_id": null,
  "yubico_secret_key": null,
  "yubico_server": null
}

Install method:

It's not "running under docker" as such, but it IS running the docker image - vaultwarden/server:alpine - 2023.3.0 - under runc. Essentially exactly the same as running under Podman. A lot like docker but with less bloat.

Clients used: Web vault works fine (2023.3.0)
Android app (2023.3.2 - latest?) gives "we were unable to process your request, please try again or contact us".
Firefox addon (2023.3.0 - latest? but also 2023.2.1 before that)
Reverse proxy and version: Apache
Other relevant details:

Steps to reproduce

Honestly not sure what's so "special" about this one particular user 😐

Expected behaviour

Log in?

Actual behaviour

Above error on android. Whirly wait-pointer on firefox plugin.

Troubleshooting data

*Originally created by @NoseyNick on 3/30/2023* ### Subject of the issue Request guard `KnownDevice` failed: "X-Request-Email value failed to decode as base64url". Web vault works fine (2023.3.0) Android app (2023.3.2 - latest?) gives "we were unable to process your request, please try again or contact us". Firefox addon (2023.3.0 - latest? but also 2023.2.1 before that) gives whirly wait-spinner thing. ... but only for ONE USER. Six other users work fine. Log says: ``` [2023-03-29 23:46:25.766][request][INFO] GET /vault/api/devices/knowndevice [2023-03-29 23:46:25.766][vaultwarden::api::core::accounts::_][WARN] Request guard `KnownDevice` failed: "X-Request-Email value failed to decode as base64url". [2023-03-29 23:46:25.766][rocket::server::_][WARN] No 400 catcher registered. Using Rocket default. [2023-03-29 23:46:25.766][response][INFO] (get_known_device) GET /vault/api/devices/knowndevice => 400 Bad Request ``` ### Deployment environment ### Your environment (Generated via diagnostics page) * Vaultwarden version: v1.28.0 * Web-vault version: v2023.3.0b * OS/Arch: linux/x86_64 * Running within Docker: false (Base: Not applicable) * Environment settings overridden: false * 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 * Database type: SQLite * Database version: 3.39.2 * Clients used: * Reverse proxy and version: * Other relevant information: ### Config (Generated via diagnostics page) <details><summary>Show Running Config</summary> **Environment settings which are overridden:** ```json { "_duo_akey": null, "_enable_duo": false, "_enable_email_2fa": true, "_enable_smtp": true, "_enable_yubico": true, "_icon_service_csp": "", "_icon_service_url": "", "_ip_header_enabled": true, "_smtp_img_src": "cid:", "admin_ratelimit_max_burst": 3, "admin_ratelimit_seconds": 300, "admin_session_lifetime": 20, "admin_token": "***", "allowed_iframe_ancestors": "", "attachments_folder": "data/attachments", "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_host": null, "duo_ikey": null, "duo_skey": null, "email_attempts_limit": 3, "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, "event_cleanup_schedule": "0 10 0 * * *", "events_days_retain": null, "extended_logging": true, "helo_name": null, "hibp_api_key": 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, "invitation_expiration_hours": 120, "invitation_org_name": "NoseyNick's Vault", "invitations_allowed": true, "ip_header": "X-Real-IP", "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": 100000, "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": 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": "NoseyNick's Vault", "smtp_host": "*********", "smtp_password": null, "smtp_port": 25, "smtp_security": "off", "smtp_ssl": null, "smtp_timeout": 15, "smtp_username": null, "templates_folder": "data/templates", "tmp_folder": "data/tmp", "trash_auto_delete_days": 14, "trash_purge_schedule": "0 5 0 * * *", "use_sendmail": false, "use_syslog": false, "user_attachment_limit": null, "web_vault_enabled": true, "web_vault_folder": "web-vault/", "websocket_address": "0.0.0.0", "websocket_enabled": false, "websocket_port": 3012, "yubico_client_id": null, "yubico_secret_key": null, "yubico_server": null } ``` </details> * Install method: It's not "running under docker" as such, but it IS running the docker image - vaultwarden/server:alpine - 2023.3.0 - under runc. Essentially exactly the same as running under Podman. A lot like docker but with less bloat. * Clients used: Web vault works fine (2023.3.0) Android app (2023.3.2 - latest?) gives "we were unable to process your request, please try again or contact us". Firefox addon (2023.3.0 - latest? but also 2023.2.1 before that) * Reverse proxy and version: Apache * Other relevant details: ### Steps to reproduce Honestly not sure what's so "special" about this one particular user :neutral_face: ### Expected behaviour Log in? ### Actual behaviour Above error on android. Whirly wait-pointer on firefox plugin. ### Troubleshooting data

MrUnknownDE closed this issue

2026-04-06 02:10:58 +02:00

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Reference: github/vaultwarden#1673

Request guard KnownDevice failed: "X-Request-Email value failed to decode as base64url" #1673