diff --git a/.gitea/workflows/security.yml b/.gitea/workflows/security.yml
new file mode 100644
index 0000000..7c779f1
--- /dev/null
+++ b/.gitea/workflows/security.yml
@@ -0,0 +1,31 @@
+name: Backend security
+
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+  schedule:
+    - cron: '17 5 * * *'
+
+jobs:
+  security:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: https://github.com/actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Record checked revision
+        run: git rev-parse HEAD
+      - name: Scan history with Gitleaks 8.30.1
+        run: |
+          curl --fail --location --silent --show-error https://github.com/gitleaks/gitleaks/releases/download/v8.30.1/gitleaks_8.30.1_linux_x64.tar.gz -o /tmp/gitleaks.tar.gz
+          echo '551f6fc83ea457d62a0d98237cbad105af8d557003051f41f3e7ca7b3f2470eb  /tmp/gitleaks.tar.gz' | sha256sum --check
+          mkdir -p /tmp/gitleaks-bin
+          tar -xzf /tmp/gitleaks.tar.gz -C /tmp/gitleaks-bin gitleaks
+          /tmp/gitleaks-bin/gitleaks git --log-opts=--all --redact=100 --no-banner
+      - uses: https://github.com/actions/setup-node@v4
+        with:
+          node-version-file: .nvmrc
+      - name: Audit runtime and development dependencies
+        run: npm audit --include=dev --audit-level=low
diff --git a/.gitea/workflows/verify.yml b/.gitea/workflows/verify.yml
new file mode 100644
index 0000000..560f50a
--- /dev/null
+++ b/.gitea/workflows/verify.yml
@@ -0,0 +1,33 @@
+name: Backend verify
+
+on:
+  push:
+    branches:
+      - '**'
+
+jobs:
+  verify:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: backend
+    steps:
+      - uses: https://github.com/actions/checkout@v4
+        with:
+          path: backend
+      - name: Checkout frontend contract
+        run: git clone --depth 1 --branch main https://git.personal.ksv741.ru/WealthLedger/frontend.git ../frontend
+      - name: Record checked revisions
+        run: |
+          git rev-parse HEAD
+          git -C ../frontend rev-parse HEAD
+      - uses: https://github.com/actions/setup-node@v4
+        with:
+          node-version-file: backend/.nvmrc
+      - run: npm ci
+      - name: Generate Prisma client before typechecks
+        run: npx --no-install prisma generate
+      - name: Run all backend gates
+        run: npm run verify
+      - name: Run isolated SQLite and runtime OpenAPI suites
+        run: npm run test:e2e
diff --git a/.gitleaksignore b/.gitleaksignore
new file mode 100644
index 0000000..733ee42
--- /dev/null
+++ b/.gitleaksignore
@@ -0,0 +1,17 @@
+# Reviewed historical false positives only; new commits remain scanned.
+# Test fixtures: base64 of the deterministic string 0123456789abcdef repeated twice.
+25d7c5780b60343fecb4f1ae9a30392776eb5aec:src/config/env.validation.spec.ts:generic-api-key:30
+31cbba8654f01adf11c52e12c2b286200d6cad7d:src/config/env.validation.spec.ts:generic-api-key:10
+31cbba8654f01adf11c52e12c2b286200d6cad7d:src/config/env.validation.spec.ts:generic-api-key:17
+31cbba8654f01adf11c52e12c2b286200d6cad7d:src/config/env.validation.spec.ts:generic-api-key:42
+31cbba8654f01adf11c52e12c2b286200d6cad7d:test/e2e-env.cjs:generic-api-key:4
+326fb67def9b3878d5447ef838ae96d50bf493d6:src/tbank/brokerage-operations.service.spec.ts:generic-api-key:15
+34c2b79e276c9575996604f3f862bc866cfe44e7:src/tbank/upcoming-events.service.spec.ts:generic-api-key:15
+c0a4a9388074bdce20138dd5649805ed24a9e9fa:src/tbank/brokerage-accounts.service.spec.ts:generic-api-key:12
+ce24a84b7fb48091d2b91836eb7b702a2f811c96:test/e2e-env.cjs:generic-api-key:16
+dfca11c81f7e6dadce3ca6f961d265c5e3f8ff8e:src/tbank/portfolio.service.spec.ts:generic-api-key:16
+# Historical .env.example JWT_SECRET is an explicit replace-with placeholder.
+4cbfc2621cfc54df3d09786905130c28a2323a04:.env.example:generic-api-key:4
+# Historical CircleCI badge copied verbatim from nestjs/typescript-starter README.
+# Verified against https://github.com/nestjs/typescript-starter/blob/master/README.md
+f8dcfb71c1767696a9aa6741ddaf6575416c901e:README.md:generic-api-key:5
diff --git a/README.md b/README.md
index 1a08311..0789dd1 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,28 @@ threshold. `npm run test:e2e` отдельно проверяет все HTTP su
 выполните обе команды. Результаты — в
 [remediation registry](../docs/development/audit-remediation.md).
 
+### CI и обновления зависимостей
+
+`.gitea/workflows/verify.yml` запускает `npm ci`, генерацию Prisma client,
+`npm run verify` и `npm run test:e2e` на каждом push ветки. Frontend snapshot
+берётся из `main` соседнего репозитория; лог сохраняет оба SHA. Изменение
+контракта согласуется с этой frontend revision. Успешный unit gate не заменяет
+SQLite/e2e; ошибка любой suite завершает job с FAIL.
+
+`security.yml` сканирует всю Git-историю Gitleaks 8.30.1 с полностью скрытыми
+значениями и выполняет `npm audit --include=dev --audit-level=low` при push,
+PR и ежедневно. `.gitleaksignore` перечисляет только проверенные исторические
+совпадения: детерминированные fixtures, placeholder и badge из Nest starter.
+Новые коммиты этими исключениями не покрываются.
+
+Renovate группирует minor/patch updates, а major требует согласования в
+Dependency Dashboard. Автоматический merge не включён. Overrides в
+`package.json` закрывают advisories транзитивных `multer`, `deepmerge-ts`,
+`mysql2` и `js-yaml`; удаляйте их, когда родительские пакеты примут исправленные
+версии. Совместимость Prisma override проверяется генерацией и SQLite migrations.
+Required checks настраиваются отдельно в Gitea: наличие workflow само по себе
+не блокирует merge.
+
 Общий `tsconfig.json` включает `strict: true` и `noFallthroughCasesInSwitch`
 для приложения, тестов и сборок. ESLint запрещает non-null assertions
 (`value!`) и definite-assignment assertions (`field!: Type`).
diff --git a/package-lock.json b/package-lock.json
index 1af0b02..22d12c3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1595,9 +1595,9 @@
       }
     },
     "node_modules/@istanbuljs/load-nyc-config/node_modules/js-yaml": {
-      "version": "3.15.1",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.15.1.tgz",
-      "integrity": "sha512-S99WuO3HlhO3XN41EtYUNl9zzXjoJx7QvmipxsJVxtCBT0YHEFy+iOJhjSvrmV12nYhWpZaM8lPHkJm0yUMbag==",
+      "version": "3.15.2",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.15.2.tgz",
+      "integrity": "sha512-6EuL879VkRA+1Cz578mKMiKvjPNEuk6+r1JaFzoSWejZmtf7xWbIyw1e3KkxlkzTIt9Taw6JBhEppG7utc1P+w==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -6254,13 +6254,23 @@
       }
     },
     "node_modules/deepmerge-ts": {
-      "version": "7.1.5",
-      "resolved": "https://registry.npmjs.org/deepmerge-ts/-/deepmerge-ts-7.1.5.tgz",
-      "integrity": "sha512-HOJkrhaYsweh+W+e74Yn7YStZOilkoPb6fycpwNLKzSPtruFs48nYis0zy5yJz1+ktUhHxoRDJ27RQAWLIJVJw==",
+      "version": "8.0.2",
+      "resolved": "https://registry.npmjs.org/deepmerge-ts/-/deepmerge-ts-8.0.2.tgz",
+      "integrity": "sha512-uqbvqLUMrc6p0MO+WBRtTxY55hmyh94WRwI5a++PZe54X+bfVh59FSN7uWCBCW1CCVjzjnrwzfI8zidE2obMMw==",
       "devOptional": true,
+      "funding": [
+        {
+          "type": "ko-fi",
+          "url": "https://ko-fi.com/rebeccastevens"
+        },
+        {
+          "type": "tidelift",
+          "url": "https://tidelift.com/funding/github/npm/deepmerge-ts"
+        }
+      ],
       "license": "BSD-3-Clause",
       "engines": {
-        "node": ">=16.0.0"
+        "node": ">=16.9.0"
       }
     },
     "node_modules/defaults": {
@@ -6303,16 +6313,6 @@
         "node": ">=0.4.0"
       }
     },
-    "node_modules/denque": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/denque/-/denque-2.1.0.tgz",
-      "integrity": "sha512-HVQE3AAb/pxF8fQAoiqpvg9i3evqug3hoiwakOyZAwJm+6vZehbkYXZ0l4JxS+I3QxM97v5aaRNhj8v5oBhekw==",
-      "devOptional": true,
-      "license": "Apache-2.0",
-      "engines": {
-        "node": ">=0.10"
-      }
-    },
     "node_modules/depd": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/depd/-/depd-2.0.0.tgz",
@@ -7170,9 +7170,9 @@
       "license": "MIT"
     },
     "node_modules/fast-uri": {
-      "version": "3.1.5",
-      "resolved": "https://registry.npmjs.org/fast-uri/-/fast-uri-3.1.5.tgz",
-      "integrity": "sha512-gHwA1O9LDIcKunMKhObS/HimwtehO1nPUECKAu5TpKgaO19fcWEl4bliWe1jWxVFvIXztJjjQ4L8XQ1EU9f7Jw==",
+      "version": "3.1.7",
+      "resolved": "https://registry.npmjs.org/fast-uri/-/fast-uri-3.1.7.tgz",
+      "integrity": "sha512-dOvZVzjdZdz7phd9v6jCbwxrBW3fK6n8Rc0CtdmM4bumzMnxywBYhuph6J819RRw/ku+rLbelwfMunktuzVVHg==",
       "devOptional": true,
       "funding": [
         {
@@ -8990,9 +8990,9 @@
       "license": "MIT"
     },
     "node_modules/js-yaml": {
-      "version": "4.3.1",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.3.1.tgz",
-      "integrity": "sha512-CY6crGq313MX8GkwvB7tzgp99vjQxY1++5y10/BKN/GUfHqWaOGQMNZkBvqSzsZKWk/ijwHlWzzkLulsGHhjWQ==",
+      "version": "4.3.2",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.3.2.tgz",
+      "integrity": "sha512-SFNOvSJ+Dgf/9An904Yx+CgSlIPCkIpao4qo51lpee25TIRejdH3rhR4EZMGoNx3/TP3O+wzWuiTFl4sqbltzA==",
       "dev": true,
       "funding": [
         {
@@ -9728,9 +9728,9 @@
       "license": "MIT"
     },
     "node_modules/multer": {
-      "version": "2.2.0",
-      "resolved": "https://registry.npmjs.org/multer/-/multer-2.2.0.tgz",
-      "integrity": "sha512-6rdyFg2kLrMh9Jee7/BMPuV9lEAd7lLW2YUpF9/YxR7njyoUwwQ0ZPh3TaIY50Sw6vlyD2HW3wGOkTS4P79xrQ==",
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/multer/-/multer-2.3.0.tgz",
+      "integrity": "sha512-cjNbm3sttszgZeGfJR124D+jFEfkXCVAsoPBmFn9X7UxmDSFHWqE2CoEj0vrmSpuAFnqWR1Szcm9QTsiHr60Xw==",
       "license": "MIT",
       "dependencies": {
         "append-field": "^1.0.0",
@@ -9800,24 +9800,25 @@
       }
     },
     "node_modules/mysql2": {
-      "version": "3.15.3",
-      "resolved": "https://registry.npmjs.org/mysql2/-/mysql2-3.15.3.tgz",
-      "integrity": "sha512-FBrGau0IXmuqg4haEZRBfHNWB5mUARw6hNwPDXXGg0XzVJ50mr/9hb267lvpVMnhZ1FON3qNd4Xfcez1rbFwSg==",
+      "version": "3.24.4",
+      "resolved": "https://registry.npmjs.org/mysql2/-/mysql2-3.24.4.tgz",
+      "integrity": "sha512-A2olluVlj0mvgyIRRISMEzXc51m+21mRtcMVjJyIpt2GG98+XrC9m9HzsqcMsX2LcnfccJvY5NB22g8fENBnOA==",
       "devOptional": true,
       "license": "MIT",
       "dependencies": {
-        "aws-ssl-profiles": "^1.1.1",
-        "denque": "^2.1.0",
+        "aws-ssl-profiles": "^1.1.2",
         "generate-function": "^2.3.1",
-        "iconv-lite": "^0.7.0",
-        "long": "^5.2.1",
-        "lru.min": "^1.0.0",
-        "named-placeholders": "^1.1.3",
-        "seq-queue": "^0.0.5",
-        "sqlstring": "^2.3.2"
+        "iconv-lite": "^0.7.3",
+        "long": "^5.3.2",
+        "lru.min": "^1.1.4",
+        "named-placeholders": "^1.1.6",
+        "sql-escaper": "^1.5.1"
       },
       "engines": {
         "node": ">= 8.0"
+      },
+      "peerDependencies": {
+        "@types/node": ">= 8"
       }
     },
     "node_modules/named-placeholders": {
@@ -10803,9 +10804,9 @@
       "license": "MIT"
     },
     "node_modules/qs": {
-      "version": "6.15.3",
-      "resolved": "https://registry.npmjs.org/qs/-/qs-6.15.3.tgz",
-      "integrity": "sha512-O9gl3zCl5h5blw1KGUzQKhA5oUXSl8rwUIM5o0S3nCXMliSvy5Dzx7/DJcI+SwgICv+IneSZwhBh1oSyEHA71A==",
+      "version": "6.16.0",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.16.0.tgz",
+      "integrity": "sha512-h6fhOIaRrID2CbEY2fqs+7t+UXZo+MLAnU5gRIq85uFtdiUPCdsApMlHhXogKVM4HM2DVbIjGNTTYH2OcmP1vA==",
       "license": "BSD-3-Clause",
       "dependencies": {
         "es-define-property": "^1.0.1",
@@ -11229,12 +11230,6 @@
         "url": "https://opencollective.com/express"
       }
     },
-    "node_modules/seq-queue": {
-      "version": "0.0.5",
-      "resolved": "https://registry.npmjs.org/seq-queue/-/seq-queue-0.0.5.tgz",
-      "integrity": "sha512-hr3Wtp/GZIc/6DAGPDcV4/9WoZhjrkXsi5B/07QgX8tsdc6ilr7BFM6PM6rbdAX1kFSDYeZGLipIZZKyQP0O5Q==",
-      "devOptional": true
-    },
     "node_modules/serve-static": {
       "version": "2.2.1",
       "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-2.2.1.tgz",
@@ -11479,14 +11474,20 @@
       "dev": true,
       "license": "BSD-3-Clause"
     },
-    "node_modules/sqlstring": {
-      "version": "2.3.3",
-      "resolved": "https://registry.npmjs.org/sqlstring/-/sqlstring-2.3.3.tgz",
-      "integrity": "sha512-qC9iz2FlN7DQl3+wjwn3802RTyjCx7sDvfQEXchwa6CWOx07/WVfh91gBmQ9fahw8snwGEWU3xGzOt4tFyHLxg==",
+    "node_modules/sql-escaper": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/sql-escaper/-/sql-escaper-1.5.1.tgz",
+      "integrity": "sha512-4toX5E1fQbBrpfXidaHnF0669nkAdETeIPTs2SUjxxD7RRIs9ICG4gtpmfc68JCEKehsdwLFqBu9VlQqZ1P1gg==",
       "devOptional": true,
       "license": "MIT",
       "engines": {
-        "node": ">= 0.6"
+        "bun": ">=1.0.0",
+        "deno": ">=2.0.0",
+        "node": ">=12.0.0"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/mysqljs/sql-escaper?sponsor=1"
       }
     },
     "node_modules/stack-utils": {
diff --git a/package.json b/package.json
index 7855287..dadcf7d 100644
--- a/package.json
+++ b/package.json
@@ -88,6 +88,15 @@
   "overrides": {
     "@nestjs/swagger@11.4.5": {
       "js-yaml": "5.2.3"
+    },
+    "@nestjs/platform-express": {
+      "multer": "2.3.0"
+    },
+    "@prisma/config@7.9.1": {
+      "deepmerge-ts": "8.0.2"
+    },
+    "prisma": {
+      "mysql2": "3.24.4"
     }
   },
   "jest": {
diff --git a/renovate.json b/renovate.json
index 7190a60..8f0899c 100644
--- a/renovate.json
+++ b/renovate.json
@@ -1,3 +1,28 @@
 {
-  "$schema": "https://docs.renovatebot.com/renovate-schema.json"
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended",
+    ":semanticCommitTypeAll(chore)"
+  ],
+  "timezone": "Europe/Moscow",
+  "labels": [
+    "dependencies"
+  ],
+  "dependencyDashboard": true,
+  "rangeStrategy": "bump",
+  "packageRules": [
+    {
+      "matchUpdateTypes": [
+        "minor",
+        "patch"
+      ],
+      "groupName": "non-major dependencies"
+    },
+    {
+      "matchUpdateTypes": [
+        "major"
+      ],
+      "dependencyDashboardApproval": true
+    }
+  ]
 }