Problem with changing KDF algorithm to Argon2id #288

New Issue

MrUnknownDE · 2026-04-05T20:47:20+02:00

MrUnknownDE commented

2026-04-05 20:47:20 +02:00

Originally created by @controlaltnerd on 11/10/2025

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: v1.34.3-9017ca26
Web-vault version: v2025.10.1
OS/Arch: linux/x86_64
Running within a container: true (Base: Alpine)
Database type: SQLite
Database version: 3.50.4
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, ADMIN_TOKEN, SSO_ENABLED, SSO_CLIENT_ID, SSO_CLIENT_SECRET, SSO_AUTHORITY

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": 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": false,
  "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": "CK Cloud Services",
  "invitations_allowed": false,
  "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": false,
  "password_iterations": 600000,
  "purge_incomplete_sso_nonce": "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": false,
  "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": "***********************",
  "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": true,
  "sso_master_password_policy": null,
  "sso_only": true,
  "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

1.34.3-9017ca26

Deployment method

Official Container Image

Custom deployment method

No response

Reverse Proxy

traefik v2.11

Host/Server Operating System

Linux

Operating System Version

Ubuntu 22.04.1

Clients

Web Vault

Client Version

CLI, Chrome, Brave - v2025.10.1

Steps To Reproduce

Go to /settings/security/security-keys in any user account
Change KDF algorithm to Argon2id
Keep all default values
Click on Change KDF
Enter master password

Expected Result

KDF algorithm successfully changed to Argon2id

Actual Result

A generic error appears in the web UI, and container logs show an error parsing JSON.

Logs

[request][INFO] POST /api/accounts/kdf

[vaultwarden::api::core::accounts::_][WARN] Data guard `Json < ChangeKdfData >` failed: Parse("
	{
		"newMasterPasswordHash": "REDACTED",
		"key": "REDACTED",
		"authenticationData": {
			"salt": "MYEMAIL@EXAMPLE.COM",
			"kdf":{
				"kdfType": 1,
				"iterations": 3,
				"memory": 64,
				"parallelism": 4
			},
			"masterPasswordAuthenticationHash": "REDACTED"
		},
		"unlockData": {
			"salt": "MYEMAIL@EXAMPLE.COM",
			"kdf":{
				"kdfType": 1,
				"iterations": 3,
				"memory": 64,
				"parallelism": 4
			},
			"masterKeyWrappedUserKey": "REDACTED"
		},
		"masterPasswordHash": "REDACTED"
	}
	", Error("missing field `kdf`", line: 1, column: 852)).

[response][INFO] (post_kdf) POST /api/accounts/kdf => 422 Unprocessable Entity

Screenshots or Videos

No response

Additional Context

I found this related issue, but it did not address the specific field that is reported as missing in the logs: https://github.com/dani-garcia/vaultwarden/pull/3210

*Originally created by @controlaltnerd on 11/10/2025* ### 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: v1.34.3-9017ca26 * Web-vault version: v2025.10.1 * OS/Arch: linux/x86_64 * Running within a container: true (Base: Alpine) * Database type: SQLite * Database version: 3.50.4 * 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, ADMIN_TOKEN, SSO_ENABLED, SSO_CLIENT_ID, SSO_CLIENT_SECRET, SSO_AUTHORITY **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": 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": false, "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": "CK Cloud Services", "invitations_allowed": false, "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": false, "password_iterations": 600000, "purge_incomplete_sso_nonce": "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": false, "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": "***********************", "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": true, "sso_master_password_policy": null, "sso_only": true, "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 1.34.3-9017ca26 ### Deployment method Official Container Image ### Custom deployment method _No response_ ### Reverse Proxy traefik v2.11 ### Host/Server Operating System Linux ### Operating System Version Ubuntu 22.04.1 ### Clients Web Vault ### Client Version CLI, Chrome, Brave - v2025.10.1 ### Steps To Reproduce 1. Go to /settings/security/security-keys in any user account 2. Change KDF algorithm to Argon2id 3. Keep all default values 4. Click on Change KDF 5. Enter master password ### Expected Result KDF algorithm successfully changed to Argon2id ### Actual Result A generic error appears in the web UI, and container logs show an error parsing JSON. ### Logs ```text [request][INFO] POST /api/accounts/kdf [vaultwarden::api::core::accounts::_][WARN] Data guard `Json < ChangeKdfData >` failed: Parse(" { "newMasterPasswordHash": "REDACTED", "key": "REDACTED", "authenticationData": { "salt": "MYEMAIL@EXAMPLE.COM", "kdf":{ "kdfType": 1, "iterations": 3, "memory": 64, "parallelism": 4 }, "masterPasswordAuthenticationHash": "REDACTED" }, "unlockData": { "salt": "MYEMAIL@EXAMPLE.COM", "kdf":{ "kdfType": 1, "iterations": 3, "memory": 64, "parallelism": 4 }, "masterKeyWrappedUserKey": "REDACTED" }, "masterPasswordHash": "REDACTED" } ", Error("missing field `kdf`", line: 1, column: 852)). [response][INFO] (post_kdf) POST /api/accounts/kdf => 422 Unprocessable Entity ``` ### Screenshots or Videos _No response_ ### Additional Context I found this related issue, but it did not address the specific field that is reported as missing in the logs: https://github.com/dani-garcia/vaultwarden/pull/3210

MrUnknownDE closed this issue

2026-04-05 20:47:20 +02:00

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Reference: github/vaultwarden#288