diff --git a/docs/gateway/security/index.md b/docs/gateway/security/index.md
index 2d58f31fdac..5424840bf4c 100644
--- a/docs/gateway/security/index.md
+++ b/docs/gateway/security/index.md
@@ -1070,12 +1070,13 @@ Hardening tips:
 
 OpenClaw loads workspace-local `.env` files for agents and tools, but never lets those files silently override gateway runtime controls.
 
+- Provider credential environment variables are blocked from untrusted workspace `.env` files. Examples include `GEMINI_API_KEY`, `GOOGLE_API_KEY`, `XAI_API_KEY`, `MISTRAL_API_KEY`, `GROQ_API_KEY`, `DEEPSEEK_API_KEY`, `PERPLEXITY_API_KEY`, `BRAVE_API_KEY`, `TAVILY_API_KEY`, `EXA_API_KEY`, `FIRECRAWL_API_KEY`, and provider auth keys declared by installed trusted plugins. Put provider credentials in the Gateway process environment, `~/.openclaw/.env` (`$OPENCLAW_STATE_DIR/.env`), the config `env` block, or optional login-shell import.
 - Any key that starts with `OPENCLAW_*` is blocked from untrusted workspace `.env` files.
 - Channel endpoint settings for Matrix, Mattermost, IRC, and Synology Chat are also blocked from workspace `.env` overrides, so cloned workspaces cannot redirect bundled connector traffic through local endpoint config. Endpoint env keys (such as `MATRIX_HOMESERVER`, `MATTERMOST_URL`, `IRC_HOST`, `SYNOLOGY_CHAT_INCOMING_URL`) must come from the gateway process environment or `env.shellEnv`, not from a workspace-loaded `.env`.
 - The block is fail-closed: a new runtime-control variable added in a future release cannot be inherited from a checked-in or attacker-supplied `.env`; the key is ignored and the gateway keeps its own value.
-- Trusted process/OS environment variables (the gateway's own shell, launchd/systemd unit, app bundle) still apply - this only constrains `.env` file loading.
+- Trusted process/OS environment variables, global runtime dotenv, config `env`, and enabled login-shell import still apply - this only constrains workspace `.env` file loading.
 
-Why: workspace `.env` files frequently live next to agent code, get committed by accident, or get written by tools. Blocking the whole `OPENCLAW_*` prefix means adding a new `OPENCLAW_*` flag later can never regress into silent inheritance from workspace state.
+Why: workspace `.env` files frequently live next to agent code, get committed by accident, or get written by tools. Blocking provider credentials prevents a cloned workspace from substituting attacker-controlled provider accounts. Blocking the whole `OPENCLAW_*` prefix means adding a new `OPENCLAW_*` flag later can never regress into silent inheritance from workspace state.
 
 ### Logs and transcripts (redaction and retention)
 
diff --git a/docs/help/environment.md b/docs/help/environment.md
index 2158f4e7d6b..b1666ac136e 100644
--- a/docs/help/environment.md
+++ b/docs/help/environment.md
@@ -8,12 +8,13 @@ title: "Environment variables"
 ---
 
 OpenClaw pulls environment variables from multiple sources. The rule is **never override existing values**.
+Workspace `.env` files are a lower-trust source: OpenClaw ignores provider credentials and protected runtime controls from workspace `.env` before applying precedence.
 
 ## Precedence (highest → lowest)
 
 1. **Process environment** (what the Gateway process already has from the parent shell/daemon).
-2. **`.env` in the current working directory** (dotenv default; does not override).
-3. **Global `.env`** at `~/.openclaw/.env` (aka `$OPENCLAW_STATE_DIR/.env`; does not override).
+2. **`.env` in the current working directory** (dotenv default; does not override; provider credentials and protected runtime controls are ignored).
+3. **Global `.env`** at `~/.openclaw/.env` (aka `$OPENCLAW_STATE_DIR/.env`; recommended for provider API keys; does not override).
 4. **Config `env` block** in `~/.openclaw/openclaw.json` (applied only if missing).
 5. **Optional login-shell import** (`env.shellEnv.enabled` or `OPENCLAW_LOAD_SHELL_ENV=1`), applied only for missing expected keys.
 
@@ -21,6 +22,21 @@ On Ubuntu fresh installs that use the default state dir, OpenClaw also treats `~
 
 If the config file is missing entirely, step 4 is skipped; shell import still runs if enabled.
 
+## Provider credentials and workspace `.env`
+
+Do not keep provider API keys only in a workspace `.env`. OpenClaw ignores provider credential environment variables from workspace `.env` files, including common keys such as `GEMINI_API_KEY`, `GOOGLE_API_KEY`, `XAI_API_KEY`, `MISTRAL_API_KEY`, `GROQ_API_KEY`, `DEEPSEEK_API_KEY`, `PERPLEXITY_API_KEY`, `BRAVE_API_KEY`, `TAVILY_API_KEY`, `EXA_API_KEY`, and `FIRECRAWL_API_KEY`.
+
+Use one of these trusted sources for provider credentials:
+
+- The Gateway process environment, such as a shell, launchd/systemd unit, container secret, or CI secret.
+- The global runtime dotenv file at `~/.openclaw/.env` or `$OPENCLAW_STATE_DIR/.env`.
+- The config `env` block in `~/.openclaw/openclaw.json`.
+- Optional login-shell import when `env.shellEnv.enabled` or `OPENCLAW_LOAD_SHELL_ENV=1` is enabled.
+
+If you previously stored provider keys only in a workspace `.env`, move them to one of the trusted sources above. Workspace `.env` can still provide ordinary project variables that are not credentials, endpoint redirects, host overrides, or `OPENCLAW_*` runtime controls.
+
+See [Workspace `.env` files](/gateway/security#workspace-env-files) for the security rationale.
+
 ## Config `env` block
 
 Two equivalent ways to set inline env vars (both are non-overriding):
diff --git a/docs/help/faq.md b/docs/help/faq.md
index cef2664c271..558d797a6c9 100644
--- a/docs/help/faq.md
+++ b/docs/help/faq.md
@@ -1085,6 +1085,9 @@ lives on the [First-run FAQ](/help/faq-first-run).
     - a global fallback `.env` from `~/.openclaw/.env` (aka `$OPENCLAW_STATE_DIR/.env`)
 
     Neither `.env` file overrides existing env vars.
+    Provider credential variables are an exception for workspace `.env`: keys such as
+    `GEMINI_API_KEY`, `XAI_API_KEY`, or `MISTRAL_API_KEY` are ignored from workspace
+    `.env` and should live in the process environment, `~/.openclaw/.env`, or config `env`.
 
     You can also define inline env vars in config (applied only if missing from the process env):
 
diff --git a/src/docs/environment-docs.test.ts b/src/docs/environment-docs.test.ts
new file mode 100644
index 00000000000..679e7a4ae5f
--- /dev/null
+++ b/src/docs/environment-docs.test.ts
@@ -0,0 +1,48 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import { describe, expect, it } from "vitest";
+
+async function readDoc(relativePath: string): Promise<string> {
+  return await fs.readFile(path.join(process.cwd(), relativePath), "utf8");
+}
+
+const providerCredentialExamples = [
+  "GEMINI_API_KEY",
+  "XAI_API_KEY",
+  "MISTRAL_API_KEY",
+  "BRAVE_API_KEY",
+] as const;
+
+describe("environment docs", () => {
+  it("documents the trusted sources for provider credentials", async () => {
+    const markdown = await readDoc("docs/help/environment.md");
+
+    expect(markdown).toContain("Provider credentials and workspace `.env`");
+    expect(markdown).toContain(
+      "OpenClaw ignores provider credential environment variables from workspace `.env` files",
+    );
+    expect(markdown).toContain("~/.openclaw/.env");
+    expect(markdown).toContain("$OPENCLAW_STATE_DIR/.env");
+    expect(markdown).toContain("The config `env` block");
+    expect(markdown).toContain("OPENCLAW_LOAD_SHELL_ENV=1");
+
+    for (const key of providerCredentialExamples) {
+      expect(markdown).toContain(key);
+    }
+  });
+
+  it("keeps the security guide aligned with the workspace dotenv credential boundary", async () => {
+    const markdown = await readDoc("docs/gateway/security/index.md");
+
+    expect(markdown).toContain(
+      "Provider credential environment variables are blocked from untrusted workspace `.env` files",
+    );
+    expect(markdown).toContain("provider auth keys declared by installed trusted plugins");
+    expect(markdown).toContain("~/.openclaw/.env");
+    expect(markdown).toContain("$OPENCLAW_STATE_DIR/.env");
+
+    for (const key of providerCredentialExamples) {
+      expect(markdown).toContain(key);
+    }
+  });
+});
diff --git a/src/infra/dotenv.test.ts b/src/infra/dotenv.test.ts
index 9e2744f0864..a34e67e970c 100644
--- a/src/infra/dotenv.test.ts
+++ b/src/infra/dotenv.test.ts
@@ -3,6 +3,14 @@ import os from "node:os";
 import path from "node:path";
 import { describe, expect, it, vi } from "vitest";
 import { loadCliDotEnv } from "../cli/dotenv.js";
+import {
+  clearCurrentPluginMetadataSnapshot,
+  setCurrentPluginMetadataSnapshot,
+} from "../plugins/current-plugin-metadata-snapshot.js";
+import { resolveInstalledPluginIndexPolicyHash } from "../plugins/installed-plugin-index-policy.js";
+import type { PluginManifestRecord } from "../plugins/manifest-registry.js";
+import type { PluginMetadataSnapshot } from "../plugins/plugin-metadata-snapshot.types.js";
+import { listKnownProviderAuthEnvVarNames } from "../secrets/provider-env-vars.js";
 import { loadDotEnv, loadWorkspaceDotEnvFile } from "./dotenv.js";
 
 const loggerMocks = vi.hoisted(() => ({
@@ -108,6 +116,54 @@ type DotEnvFixture = {
   stateDir: string;
 };
 
+function emptyOwnerMaps(): PluginMetadataSnapshot["owners"] {
+  return {
+    channels: new Map(),
+    channelConfigs: new Map(),
+    providers: new Map(),
+    modelCatalogProviders: new Map(),
+    cliBackends: new Map(),
+    setupProviders: new Map(),
+    commandAliases: new Map(),
+    contracts: new Map(),
+  };
+}
+
+function createManifestBackedProviderSnapshot(
+  plugin: PluginManifestRecord,
+): PluginMetadataSnapshot {
+  const policyHash = resolveInstalledPluginIndexPolicyHash({});
+  return {
+    policyHash,
+    index: {
+      version: 1,
+      hostContractVersion: "test",
+      compatRegistryVersion: "test",
+      migrationVersion: 1,
+      policyHash,
+      generatedAtMs: 0,
+      installRecords: {},
+      plugins: [],
+      diagnostics: [],
+    },
+    registryDiagnostics: [],
+    manifestRegistry: { plugins: [plugin], diagnostics: [] },
+    plugins: [plugin],
+    diagnostics: [],
+    byPluginId: new Map([[plugin.id, plugin]]),
+    normalizePluginId: (pluginId: string) => pluginId,
+    owners: emptyOwnerMaps(),
+    metrics: {
+      registrySnapshotMs: 0,
+      manifestRegistryMs: 0,
+      ownerMapsMs: 0,
+      totalMs: 0,
+      indexPluginCount: 0,
+      manifestPluginCount: 1,
+    },
+  };
+}
+
 async function withDotEnvFixture(run: (fixture: DotEnvFixture) => Promise<void>) {
   const base = await fs.mkdtemp(path.join(os.tmpdir(), "openclaw-dotenv-test-"));
   const cwdDir = path.join(base, "cwd");
@@ -749,6 +805,78 @@ describe("loadCliDotEnv", () => {
 });
 
 describe("workspace .env blocklist completeness", () => {
+  it("keeps trusted global dotenv for global plugin provider auth vars", async () => {
+    await withIsolatedEnvAndCwd(async () => {
+      await withDotEnvFixture(async ({ cwdDir, stateDir }) => {
+        const plugin: PluginManifestRecord = {
+          id: "runtime-cloud",
+          channels: [],
+          providers: ["runtime-cloud"],
+          cliBackends: [],
+          skills: [],
+          hooks: [],
+          origin: "global",
+          rootDir: "/plugins/runtime-cloud",
+          source: "/plugins/runtime-cloud/index.js",
+          manifestPath: "/plugins/runtime-cloud/openclaw.plugin.json",
+          providerAuthEnvVars: {
+            "runtime-cloud": ["RUNTIME_CLOUD_API_KEY"],
+          },
+        };
+        await writeEnvFile(
+          path.join(cwdDir, ".env"),
+          "RUNTIME_CLOUD_API_KEY=workspace-plugin-key\n",
+        );
+        await writeEnvFile(
+          path.join(stateDir, ".env"),
+          "RUNTIME_CLOUD_API_KEY=global-plugin-key\n",
+        );
+
+        delete process.env.RUNTIME_CLOUD_API_KEY;
+        vi.spyOn(process, "cwd").mockReturnValue(cwdDir);
+        setCurrentPluginMetadataSnapshot(createManifestBackedProviderSnapshot(plugin), {
+          config: {},
+          env: process.env,
+        });
+
+        try {
+          loadDotEnv({ quiet: true });
+
+          expect(process.env.RUNTIME_CLOUD_API_KEY).toBe("global-plugin-key");
+        } finally {
+          clearCurrentPluginMetadataSnapshot();
+        }
+      });
+    });
+  });
+
+  it("keeps registered provider auth vars from trusted global dotenv", async () => {
+    await withIsolatedEnvAndCwd(async () => {
+      await withDotEnvFixture(async ({ cwdDir, stateDir }) => {
+        const providerAuthKeys = listKnownProviderAuthEnvVarNames().toSorted();
+        await writeEnvFile(
+          path.join(cwdDir, ".env"),
+          `${providerAuthKeys.map((key) => `${key}=workspace-${key}`).join("\n")}\n`,
+        );
+        await writeEnvFile(
+          path.join(stateDir, ".env"),
+          `${providerAuthKeys.map((key) => `${key}=global-${key}`).join("\n")}\n`,
+        );
+
+        clearEnv(providerAuthKeys);
+        vi.spyOn(process, "cwd").mockReturnValue(cwdDir);
+
+        loadDotEnv({ quiet: true });
+
+        for (const key of providerAuthKeys) {
+          expect(process.env[key], `${key} should come from trusted global .env`).toBe(
+            `global-${key}`,
+          );
+        }
+      });
+    });
+  });
+
   it("blocks runtime-control variables from workspace .env", async () => {
     await withIsolatedEnvAndCwd(async () => {
       await withDotEnvFixture(async ({ cwdDir }) => {
diff --git a/src/infra/dotenv.ts b/src/infra/dotenv.ts
index 56f612efc2f..bc5baae6559 100644
--- a/src/infra/dotenv.ts
+++ b/src/infra/dotenv.ts
@@ -3,6 +3,7 @@ import os from "node:os";
 import path from "node:path";
 import dotenv from "dotenv";
 import { createSubsystemLogger } from "../logging/subsystem.js";
+import { listKnownProviderAuthEnvVarNames } from "../secrets/provider-env-vars.js";
 import { resolveConfigDir } from "../utils.js";
 import { resolveRequiredHomeDir } from "./home-dir.js";
 import {
@@ -13,10 +14,95 @@ import {
 
 const logger = createSubsystemLogger("infra:dotenv");
 
-const BLOCKED_WORKSPACE_DOTENV_KEYS = new Set([
-  "ALL_PROXY",
+const BLOCKED_PROVIDER_AUTH_WORKSPACE_DOTENV_KEYS = [
+  "AI_GATEWAY_API_KEY",
   "ANTHROPIC_API_KEY",
   "ANTHROPIC_OAUTH_TOKEN",
+  "ARCEEAI_API_KEY",
+  "AZURE_OPENAI_API_KEY",
+  "AZURE_SPEECH_API_KEY",
+  "AZURE_SPEECH_KEY",
+  "AZURE_SPEECH_REGION",
+  "BRAVE_API_KEY",
+  "BYTEPLUS_API_KEY",
+  "BYTEPLUS_SEED_SPEECH_API_KEY",
+  "CEREBRAS_API_KEY",
+  "CHUTES_API_KEY",
+  "CHUTES_OAUTH_TOKEN",
+  "CLOUDFLARE_AI_GATEWAY_API_KEY",
+  "COMFY_API_KEY",
+  "COMFY_CLOUD_API_KEY",
+  "COPILOT_GITHUB_TOKEN",
+  "DASHSCOPE_API_KEY",
+  "DEEPGRAM_API_KEY",
+  "DEEPINFRA_API_KEY",
+  "DEEPSEEK_API_KEY",
+  "ELEVENLABS_API_KEY",
+  "EXA_API_KEY",
+  "FAL_API_KEY",
+  "FAL_KEY",
+  "FIRECRAWL_API_KEY",
+  "FIREWORKS_API_KEY",
+  "GEMINI_API_KEY",
+  "GH_TOKEN",
+  "GITHUB_TOKEN",
+  "GOOGLE_API_KEY",
+  "GOOGLE_CLOUD_API_KEY",
+  "GRADIUM_API_KEY",
+  "GROQ_API_KEY",
+  "HF_TOKEN",
+  "HUGGINGFACE_HUB_TOKEN",
+  "INWORLD_API_KEY",
+  "KILOCODE_API_KEY",
+  "KIMICODE_API_KEY",
+  "KIMI_API_KEY",
+  "LITELLM_API_KEY",
+  "LM_API_TOKEN",
+  "MINIMAX_API_KEY",
+  "MINIMAX_CODE_PLAN_KEY",
+  "MINIMAX_CODING_API_KEY",
+  "MINIMAX_OAUTH_TOKEN",
+  "MISTRAL_API_KEY",
+  "MODELSTUDIO_API_KEY",
+  "MOONSHOT_API_KEY",
+  "NVIDIA_API_KEY",
+  "OLLAMA_API_KEY",
+  "OPENAI_API_KEY",
+  "OPENCODE_API_KEY",
+  "OPENCODE_ZEN_API_KEY",
+  "OPENROUTER_API_KEY",
+  "PERPLEXITY_API_KEY",
+  "QIANFAN_API_KEY",
+  "QWEN_API_KEY",
+  "RUNWAY_API_KEY",
+  "RUNWAYML_API_SECRET",
+  "SENSEAUDIO_API_KEY",
+  "SGLANG_API_KEY",
+  "SPEECH_KEY",
+  "SPEECH_REGION",
+  "STEPFUN_API_KEY",
+  "SYNTHETIC_API_KEY",
+  "TAVILY_API_KEY",
+  "TOGETHER_API_KEY",
+  "TOKENHUB_API_KEY",
+  "VENICE_API_KEY",
+  "VLLM_API_KEY",
+  "VOLCANO_ENGINE_API_KEY",
+  "VOLCENGINE_TTS_API_KEY",
+  "VOLCENGINE_TTS_APPID",
+  "VOLCENGINE_TTS_TOKEN",
+  "VOYAGE_API_KEY",
+  "VYDRA_API_KEY",
+  "XAI_API_KEY",
+  "XIAOMI_API_KEY",
+  "XI_API_KEY",
+  "ZAI_API_KEY",
+  "Z_AI_API_KEY",
+] as const;
+
+const BLOCKED_WORKSPACE_DOTENV_KEYS = new Set([
+  ...BLOCKED_PROVIDER_AUTH_WORKSPACE_DOTENV_KEYS,
+  "ALL_PROXY",
   "BROWSER_EXECUTABLE_PATH",
   "CLAWHUB_AUTH_TOKEN",
   "CLAWHUB_CONFIG_PATH",
@@ -36,7 +122,6 @@ const BLOCKED_WORKSPACE_DOTENV_KEYS = new Set([
   "NODE_TLS_REJECT_UNAUTHORIZED",
   "NO_PROXY",
   "NPM_EXECPATH",
-  "OPENAI_API_KEY",
   "OPENAI_API_KEYS",
   "OPENCLAW_AGENT_DIR",
   "OPENCLAW_ALLOW_PLUGIN_INSTALL_OVERRIDES",
@@ -120,13 +205,30 @@ function shouldBlockRuntimeDotEnvKey(key: string): boolean {
   return false;
 }
 
-function shouldBlockWorkspaceDotEnvKey(key: string): boolean {
+function buildProviderAuthWorkspaceDotEnvBlocklist(): ReadonlySet<string> {
+  const keys = new Set<string>(BLOCKED_PROVIDER_AUTH_WORKSPACE_DOTENV_KEYS);
+  for (const rawKey of listKnownProviderAuthEnvVarNames({
+    includeUntrustedWorkspacePlugins: false,
+  })) {
+    const key = normalizeEnvVarKey(rawKey, { portable: true });
+    if (key) {
+      keys.add(key.toUpperCase());
+    }
+  }
+  return keys;
+}
+
+function shouldBlockWorkspaceDotEnvKey(
+  key: string,
+  getProviderAuthBlockedKeys: () => ReadonlySet<string>,
+): boolean {
   const upper = key.toUpperCase();
   return (
     shouldBlockWorkspaceRuntimeDotEnvKey(upper) ||
     BLOCKED_WORKSPACE_DOTENV_KEYS.has(upper) ||
     BLOCKED_WORKSPACE_DOTENV_PREFIXES.some((prefix) => upper.startsWith(prefix)) ||
-    BLOCKED_WORKSPACE_DOTENV_SUFFIXES.some((suffix) => upper.endsWith(suffix))
+    BLOCKED_WORKSPACE_DOTENV_SUFFIXES.some((suffix) => upper.endsWith(suffix)) ||
+    getProviderAuthBlockedKeys().has(upper)
   );
 }
 
@@ -180,9 +282,14 @@ function readDotEnvFile(params: {
 }
 
 export function loadWorkspaceDotEnvFile(filePath: string, opts?: { quiet?: boolean }) {
+  let providerAuthBlockedKeys: ReadonlySet<string> | undefined;
+  const getProviderAuthBlockedKeys = () => {
+    providerAuthBlockedKeys ??= buildProviderAuthWorkspaceDotEnvBlocklist();
+    return providerAuthBlockedKeys;
+  };
   const parsed = readDotEnvFile({
     filePath,
-    shouldBlockKey: shouldBlockWorkspaceDotEnvKey,
+    shouldBlockKey: (key) => shouldBlockWorkspaceDotEnvKey(key, getProviderAuthBlockedKeys),
     quiet: opts?.quiet ?? true,
   });
   if (!parsed) {