diff --git a/.github/workflows/pr-ci.yml b/.github/workflows/pr-ci.yml
index 700481efd3..a5a220c223 100644
--- a/.github/workflows/pr-ci.yml
+++ b/.github/workflows/pr-ci.yml
@@ -25,17 +25,17 @@ jobs:
     name: Install
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
 
       # Node 22.x ships npm 10, whose peer resolver crashes on MemoryCore's
       # vitest@4 peer graph ("Cannot read properties of null (reading 'edgesOut')").
       # Node 24 ships npm 11, which resolves it; engines allows >=22.16.0.
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
           node-version: "24"
 
       - name: Cache node_modules
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
         id: cache-deps
         with:
           path: MemoryCore/node_modules
@@ -51,14 +51,14 @@ jobs:
     needs: install
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
           node-version: "24"
 
       - name: Restore node_modules
-        uses: actions/cache@v4
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
         with:
           path: MemoryCore/node_modules
           key: deps-${{ runner.os }}-${{ hashFiles('MemoryCore/package.json') }}
@@ -70,7 +70,7 @@ jobs:
         run: npm pack
 
       - name: Upload .tgz artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
         with:
           name: package-tarball
           path: "MemoryCore/*.tgz"
@@ -81,7 +81,7 @@ jobs:
     name: Manifest
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
 
       - name: Validate openclaw.plugin.json
         run: |
@@ -124,7 +124,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download tarball
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
         with:
           name: package-tarball
           path: MemoryCore
@@ -155,7 +155,7 @@ jobs:
     name: Skill Queue Isolation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
         with:
           fetch-depth: 0   # 需要完整历史以便 git diff base..HEAD
 
diff --git a/MemoryCore/src/gateway/chat-memory-e2e-helpers.ts b/MemoryCore/src/gateway/chat-memory-e2e-helpers.ts
index 2c21eb4b7c..0a397fc743 100644
--- a/MemoryCore/src/gateway/chat-memory-e2e-helpers.ts
+++ b/MemoryCore/src/gateway/chat-memory-e2e-helpers.ts
@@ -90,12 +90,13 @@ export async function post<T = unknown>(
 // ── user / team / agent 装置 ──
 
 let adminKey: string | undefined;
+let fixtureSeq = 0;
 
 async function seedAdminOnce(): Promise<string> {
   if (adminKey) return adminKey;
   const r = await post<{ user_key?: string; default_user_key?: string }>(
     "/v3/internal/meta/user/init-admin",
-    { username: `admin-${Math.random().toString(36).slice(2, 8)}` },
+    { username: `admin-${++fixtureSeq}` },
   );
   expect(r.body.code).toBe(0);
   adminKey = r.body.data!.user_key ?? r.body.data!.default_user_key!;
@@ -117,7 +118,7 @@ export async function makeFixture(tag: string, messageCount = 3): Promise<Fixtur
   const key = await seedAdminOnce();
   const u = await post<{ user_id: string; default_user_key: string }>(
     "/v3/meta/user/create",
-    { username: `u-${tag}-${Math.random().toString(36).slice(2, 6)}` },
+    { username: `u-${tag}-${++fixtureSeq}` },
     { userKey: key },
   );
   expect(u.body.code).toBe(0);
diff --git a/MemoryCore/src/metadata/utils/crypto.ts b/MemoryCore/src/metadata/utils/crypto.ts
index 4c3664b979..731adf6802 100644
--- a/MemoryCore/src/metadata/utils/crypto.ts
+++ b/MemoryCore/src/metadata/utils/crypto.ts
@@ -9,7 +9,7 @@
  * v3.1 起元数据 User 域不再使用 password 哈希；本模块仅保留 generateUserKey 与历史 hash 工具。
  */
 
-import { randomBytes, scryptSync, timingSafeEqual } from "node:crypto";
+import { randomBytes, randomInt, scryptSync, timingSafeEqual } from "node:crypto";
 import { USER_KEY_PREFIX } from "./user-key.js";
 
 /**
@@ -26,10 +26,9 @@ const PASSWORD_CHARSET = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01
 
 /** 生成随机密码（默认 12 位，字符集：大小写字母、数字、下划线）。 */
 export function generatePassword(length = 12): string {
-  const bytes = randomBytes(length);
   let out = "";
   for (let i = 0; i < length; i++) {
-    out += PASSWORD_CHARSET[bytes[i]! % PASSWORD_CHARSET.length];
+    out += PASSWORD_CHARSET[randomInt(PASSWORD_CHARSET.length)];
   }
   return out;
 }
diff --git a/MemoryCore/src/metadata/utils/id-generator.ts b/MemoryCore/src/metadata/utils/id-generator.ts
index cfa3da3305..bee0dee619 100644
--- a/MemoryCore/src/metadata/utils/id-generator.ts
+++ b/MemoryCore/src/metadata/utils/id-generator.ts
@@ -6,7 +6,7 @@
  *   - 关联关系表：UUID v4（`randomUUID()`）
  */
 
-import { randomUUID } from "node:crypto";
+import { randomInt, randomUUID } from "node:crypto";
 
 const CHARS = "abcdefghijklmnopqrstuvwxyz0123456789";
 const BASE = CHARS.length; // 36
@@ -43,7 +43,7 @@ function encodeBase36(value: number, length: number): string {
 function randomBase36(length: number): string {
   let out = "";
   for (let i = 0; i < length; i++) {
-    out += CHARS[Math.floor(Math.random() * BASE)];
+    out += CHARS[randomInt(BASE)];
   }
   return out;
 }
diff --git a/MemoryCore/src/offload/backend-client.ts b/MemoryCore/src/offload/backend-client.ts
index 9d4957e512..61adfd1af7 100644
--- a/MemoryCore/src/offload/backend-client.ts
+++ b/MemoryCore/src/offload/backend-client.ts
@@ -13,6 +13,12 @@ import { traceOffloadModelIo } from "./opik-tracer.js";
 import * as https from "node:https";
 import * as http from "node:http";
 
+function stripTrailingSlashes(value: string): string {
+  let end = value.length;
+  while (end > 0 && value.charCodeAt(end - 1) === 47) end--;
+  return value.slice(0, end);
+}
+
 // ─── Request / Response Types ────────────────────────────────────────────────
 
 export interface L1Request {
@@ -126,7 +132,7 @@ export class BackendClient {
     userIdFn?: () => string | null,
     taskIdFn?: () => string | null,
   ) {
-    this.baseUrl = baseUrl.replace(/\/+$/, "");
+    this.baseUrl = stripTrailingSlashes(baseUrl);
     this.apiKey = apiKey;
     this.logger = logger;
     this.sessionKeyFn = sessionKeyFn ?? (() => null);
diff --git a/MemoryProxy/src/anthropicHandler.ts b/MemoryProxy/src/anthropicHandler.ts
index 00e37a46f1..7bb31cb918 100644
--- a/MemoryProxy/src/anthropicHandler.ts
+++ b/MemoryProxy/src/anthropicHandler.ts
@@ -421,9 +421,9 @@ async function forwardWithRetry(
       const prefixEnd = anchorIdx >= 0 ? anchorIdx + 1 : msgs.length;
       const msgsPrefixStr = JSON.stringify(msgs.slice(0, prefixEnd));
 
-      const sysFullMd5 = createHash("md5").update(sysFullStr).digest("hex").slice(0, 12);
-      const sysTextMd5 = createHash("md5").update(sysTextStr).digest("hex").slice(0, 12);
-      const msgsPrefixMd5 = createHash("md5").update(msgsPrefixStr).digest("hex").slice(0, 12);
+      const sysFullMd5 = createHash("sha256").update(sysFullStr).digest("hex").slice(0, 12);
+      const sysTextMd5 = createHash("sha256").update(sysTextStr).digest("hex").slice(0, 12);
+      const msgsPrefixMd5 = createHash("sha256").update(msgsPrefixStr).digest("hex").slice(0, 12);
 
       // eslint-disable-next-line no-console
       console.log(
diff --git a/MemoryProxy/src/identity.ts b/MemoryProxy/src/identity.ts
index 51d3330324..2697f55c1f 100644
--- a/MemoryProxy/src/identity.ts
+++ b/MemoryProxy/src/identity.ts
@@ -123,6 +123,9 @@ export function extractClientIdentity(
     }
   }
 
+  // Lookup / pseudonymization index for trace grouping, not password storage:
+  // the input is a high-entropy API key and nothing is persisted for comparison,
+  // so a fast hash is intentional and CWE-916 does not apply.
   const keyId = apiKey
     ? createHash("sha256").update(apiKey).digest("hex").slice(0, 8)
     : "unknown";
diff --git a/MemoryProxy/src/langfuse.ts b/MemoryProxy/src/langfuse.ts
index 312e1cf9d9..933f56afcc 100644
--- a/MemoryProxy/src/langfuse.ts
+++ b/MemoryProxy/src/langfuse.ts
@@ -105,6 +105,9 @@ export async function shutdownLangfuse(): Promise<void> {
  * 与官方 `createTraceId(seed)` 算法一致：SHA-256(seed) 的 hex 取前 32 位。
  * 同一 turn 内每次请求都用相同 (sessionKey, turnSeq) → 得到相同 traceId →
  * 在 Langfuse 中归并到同一个 trace。
+ *
+ * 这是 trace 归并用的确定性索引，不是密码存储/校验：输入为高熵 API key 派生的
+ * sessionKey，且不落库做比对，因此使用快速哈希是有意为之，CWE-916 不适用。
  */
 export function langfuseTurnTraceId(sessionKey: string, turnSeq: number): string {
   const seed = `${sessionKey}:${turnSeq}`;
diff --git a/MemoryProxy/src/opik.ts b/MemoryProxy/src/opik.ts
index f8a8b6a52d..9f739126f1 100644
--- a/MemoryProxy/src/opik.ts
+++ b/MemoryProxy/src/opik.ts
@@ -33,7 +33,13 @@ function uuidv7(): string {
   return `${p1}-${p2}-${p3}-${p4}-${p5}`;
 }
 
-/** Derive an 8-char key ID from an API key (SHA-256 first 8 hex chars). */
+/** Derive an 8-char key ID from an API key (SHA-256 first 8 hex chars).
+ *
+ *  This is a lookup / pseudonymization index for trace grouping, not password
+ *  storage or verification: the input is a high-entropy API key and nothing is
+ *  persisted for later comparison. A fast hash is therefore intentional and
+ *  CWE-916 (insufficient password hash) does not apply.
+ */
 export function apiKeyToKeyId(apiKey: string): string {
   return createHash("sha256").update(apiKey).digest("hex").slice(0, 8);
 }
diff --git a/sdk/memory-core/typescript/src/cos.ts b/sdk/memory-core/typescript/src/cos.ts
index 80fe3e306a..01833eb877 100644
--- a/sdk/memory-core/typescript/src/cos.ts
+++ b/sdk/memory-core/typescript/src/cos.ts
@@ -17,6 +17,7 @@
  */
 
 import { TDAMError } from "./errors.js";
+import { stripTrailingSlashes } from "./http.js";
 import { createHmac, createHash } from "node:crypto";
 
 // ============================
@@ -123,7 +124,7 @@ export class StsCredentialManager {
     config: MemoryFileReaderConfig,
     bufferMs = 120_000,
   ) {
-    this.endpoint = config.endpoint.replace(/\/+$/, "");
+    this.endpoint = stripTrailingSlashes(config.endpoint);
     this.apiKey = config.apiKey;
     this.serviceId = config.serviceId;
     this.timeout = config.timeout ?? 30_000;
diff --git a/sdk/memory-core/typescript/src/http.ts b/sdk/memory-core/typescript/src/http.ts
index 0f0ead6343..c110a73a2f 100644
--- a/sdk/memory-core/typescript/src/http.ts
+++ b/sdk/memory-core/typescript/src/http.ts
@@ -25,6 +25,12 @@ export interface HttpTransportOptions {
   rejectUnauthorized?: boolean;
 }
 
+export function stripTrailingSlashes(value: string): string {
+  let end = value.length;
+  while (end > 0 && value.charCodeAt(end - 1) === 47) end--;
+  return value.slice(0, end);
+}
+
 export class HttpTransport {
   private readonly endpoint: string;
   private readonly headers: Record<string, string>;
@@ -32,7 +38,7 @@ export class HttpTransport {
   private dispatcher: unknown;
 
   constructor(opts: HttpTransportOptions) {
-    this.endpoint = opts.endpoint.replace(/\/+$/, "");
+    this.endpoint = stripTrailingSlashes(opts.endpoint);
     this.timeout = opts.timeout ?? 30_000;
     this.headers = {
       Authorization: `Bearer ${opts.apiKey}`,
diff --git a/sdk/memory-core/typescript/src/v3/http.ts b/sdk/memory-core/typescript/src/v3/http.ts
index d6147c0c04..415e30ab64 100644
--- a/sdk/memory-core/typescript/src/v3/http.ts
+++ b/sdk/memory-core/typescript/src/v3/http.ts
@@ -2,7 +2,7 @@
 
 import { Agent } from "undici";
 import { ParamError, TDAMError } from "../errors.js";
-import type { HttpTransportOptions } from "../http.js";
+import { stripTrailingSlashes, type HttpTransportOptions } from "../http.js";
 import type { ApiResponseEnvelope } from "../types.js";
 
 export class V3HttpTransport {
@@ -28,7 +28,7 @@ export class V3HttpTransport {
       throw new ParamError("timeout must be a positive number");
     }
 
-    this.endpoint = opts.endpoint.replace(/\/+$/, "");
+    this.endpoint = stripTrailingSlashes(opts.endpoint);
     this.timeout = timeout;
     this.headers = {
       Authorization: `Bearer ${opts.apiKey}`,