diff --git a/packages/backend/src/server/api/endpoints/i/2fa/key-done.ts b/packages/backend/src/server/api/endpoints/i/2fa/key-done.ts
index a4e61a0e8f..084d4af658 100644
--- a/packages/backend/src/server/api/endpoints/i/2fa/key-done.ts
+++ b/packages/backend/src/server/api/endpoints/i/2fa/key-done.ts
@@ -14,12 +14,19 @@ import type { UserProfilesRepository, UserSecurityKeysRepository } from '@/model
 import { WebAuthnService } from '@/core/WebAuthnService.js';
 import { ApiError } from '@/server/api/error.js';
 import { UserAuthService } from '@/core/UserAuthService.js';
+import ms from 'ms';
 
 export const meta = {
 	requireCredential: true,
 
 	secure: true,
 
+	limit: {
+		duration: ms('1hour'),
+		max: 10,
+		minInterval: ms('1sec'),
+	},
+
 	errors: {
 		incorrectPassword: {
 			message: 'Incorrect password.',
diff --git a/packages/backend/src/server/api/endpoints/i/2fa/register-key.ts b/packages/backend/src/server/api/endpoints/i/2fa/register-key.ts
index cc6e9ee42d..6ab50a57c9 100644
--- a/packages/backend/src/server/api/endpoints/i/2fa/register-key.ts
+++ b/packages/backend/src/server/api/endpoints/i/2fa/register-key.ts
@@ -12,12 +12,19 @@ import { DI } from '@/di-symbols.js';
 import { WebAuthnService } from '@/core/WebAuthnService.js';
 import { ApiError } from '@/server/api/error.js';
 import { UserAuthService } from '@/core/UserAuthService.js';
+import ms from 'ms';
 
 export const meta = {
 	requireCredential: true,
 
 	secure: true,
 
+	limit: {
+		duration: ms('1hour'),
+		max: 10,
+		minInterval: ms('1sec'),
+	},
+
 	errors: {
 		userNotFound: {
 			message: 'User not found.',
diff --git a/packages/backend/src/server/api/endpoints/i/2fa/register.ts b/packages/backend/src/server/api/endpoints/i/2fa/register.ts
index 7283159f87..888d0fc6ef 100644
--- a/packages/backend/src/server/api/endpoints/i/2fa/register.ts
+++ b/packages/backend/src/server/api/endpoints/i/2fa/register.ts
@@ -14,12 +14,19 @@ import { DI } from '@/di-symbols.js';
 import type { Config } from '@/config.js';
 import { ApiError } from '@/server/api/error.js';
 import { UserAuthService } from '@/core/UserAuthService.js';
+import ms from 'ms';
 
 export const meta = {
 	requireCredential: true,
 
 	secure: true,
 
+	limit: {
+		duration: ms('1hour'),
+		max: 10,
+		minInterval: ms('1sec'),
+	},
+
 	errors: {
 		incorrectPassword: {
 			message: 'Incorrect password.',
diff --git a/packages/backend/src/server/api/endpoints/i/2fa/remove-key.ts b/packages/backend/src/server/api/endpoints/i/2fa/remove-key.ts
index 098fd59303..614fd0c498 100644
--- a/packages/backend/src/server/api/endpoints/i/2fa/remove-key.ts
+++ b/packages/backend/src/server/api/endpoints/i/2fa/remove-key.ts
@@ -13,10 +13,17 @@ import { GlobalEventService } from '@/core/GlobalEventService.js';
 import { DI } from '@/di-symbols.js';
 import { ApiError } from '@/server/api/error.js';
 import { UserAuthService } from '@/core/UserAuthService.js';
+import ms from 'ms';
 
 export const meta = {
 	requireCredential: true,
 
+	limit: {
+		duration: ms('1hour'),
+		max: 10,
+		minInterval: ms('1sec'),
+	},
+
 	secure: true,
 
 	errors: {
diff --git a/packages/backend/src/server/api/endpoints/i/2fa/unregister.ts b/packages/backend/src/server/api/endpoints/i/2fa/unregister.ts
index 8da331505b..2773825373 100644
--- a/packages/backend/src/server/api/endpoints/i/2fa/unregister.ts
+++ b/packages/backend/src/server/api/endpoints/i/2fa/unregister.ts
@@ -13,12 +13,19 @@ import { GlobalEventService } from '@/core/GlobalEventService.js';
 import { DI } from '@/di-symbols.js';
 import { ApiError } from '@/server/api/error.js';
 import { UserAuthService } from '@/core/UserAuthService.js';
+import ms from 'ms';
 
 export const meta = {
 	requireCredential: true,
 
 	secure: true,
 
+	limit: {
+		duration: ms('1hour'),
+		max: 10,
+		minInterval: ms('1sec'),
+	},
+
 	errors: {
 		incorrectPassword: {
 			message: 'Incorrect password.',
diff --git a/packages/backend/src/server/api/endpoints/i/change-password.ts b/packages/backend/src/server/api/endpoints/i/change-password.ts
index 6aedde717c..f131c7e9d1 100644
--- a/packages/backend/src/server/api/endpoints/i/change-password.ts
+++ b/packages/backend/src/server/api/endpoints/i/change-password.ts
@@ -10,10 +10,17 @@ import { Endpoint } from '@/server/api/endpoint-base.js';
 import type { UserProfilesRepository } from '@/models/_.js';
 import { DI } from '@/di-symbols.js';
 import { UserAuthService } from '@/core/UserAuthService.js';
+import ms from 'ms';
 
 export const meta = {
 	requireCredential: true,
 
+	limit: {
+		duration: ms('1hour'),
+		max: 10,
+		minInterval: ms('1sec'),
+	},
+
 	secure: true,
 } as const;
 
diff --git a/packages/backend/src/server/api/endpoints/i/delete-account.ts b/packages/backend/src/server/api/endpoints/i/delete-account.ts
index af4d601ad6..565eaaafc0 100644
--- a/packages/backend/src/server/api/endpoints/i/delete-account.ts
+++ b/packages/backend/src/server/api/endpoints/i/delete-account.ts
@@ -11,10 +11,17 @@ import { Endpoint } from '@/server/api/endpoint-base.js';
 import { DeleteAccountService } from '@/core/DeleteAccountService.js';
 import { DI } from '@/di-symbols.js';
 import { UserAuthService } from '@/core/UserAuthService.js';
+import ms from 'ms';
 
 export const meta = {
 	requireCredential: true,
 
+	limit: {
+		duration: ms('1hour'),
+		max: 10,
+		minInterval: ms('1sec'),
+	},
+
 	secure: true,
 } as const;
 
diff --git a/packages/backend/src/server/api/endpoints/i/regenerate-token.ts b/packages/backend/src/server/api/endpoints/i/regenerate-token.ts
index e1cdfdc185..814ffb5488 100644
--- a/packages/backend/src/server/api/endpoints/i/regenerate-token.ts
+++ b/packages/backend/src/server/api/endpoints/i/regenerate-token.ts
@@ -11,10 +11,17 @@ import type { UsersRepository, UserProfilesRepository } from '@/models/_.js';
 import generateUserToken from '@/misc/generate-native-user-token.js';
 import { GlobalEventService } from '@/core/GlobalEventService.js';
 import { DI } from '@/di-symbols.js';
+import ms from 'ms';
 
 export const meta = {
 	requireCredential: true,
 
+	limit: {
+		duration: ms('1hour'),
+		max: 10,
+		minInterval: ms('1sec'),
+	},
+
 	secure: true,
 } as const;