diff --git a/scripts/e2e/parallels/host-command.ts b/scripts/e2e/parallels/host-command.ts
index b9b5d5bbd442..26831b9ef731 100644
--- a/scripts/e2e/parallels/host-command.ts
+++ b/scripts/e2e/parallels/host-command.ts
@@ -4,6 +4,10 @@ import { createWriteStream } from "node:fs";
 import path from "node:path";
 import { finished } from "node:stream/promises";
 import { fileURLToPath } from "node:url";
+import {
+  addTimerTimeoutGraceMs,
+  clampTimerTimeoutMs,
+} from "@openclaw/normalization-core/number-coercion";
 import { resolveNpmRunner } from "../../npm-runner.mjs";
 import { resolvePnpmRunner } from "../../pnpm-runner.mjs";
 import { buildCmdExeCommandLine, resolveWindowsCmdExePath } from "../../windows-cmd-helpers.mjs";
@@ -338,6 +342,14 @@ function isBareCommand(command: string, name: "npm" | "pnpm"): boolean {
   return portableBasename(command) === command && command.toLowerCase() === name;
 }
 
+function resolveHostCommandTimeoutMs(timeoutMs: number): number {
+  return clampTimerTimeoutMs(timeoutMs) ?? 1;
+}
+
+function resolveOptionalHostCommandTimeoutMs(timeoutMs: number | undefined): number | undefined {
+  return timeoutMs === undefined ? undefined : resolveHostCommandTimeoutMs(timeoutMs);
+}
+
 export function resolveHostCommandInvocation(
   command: string,
   args: string[],
@@ -387,9 +399,10 @@ export function resolveHostCommandInvocation(
 export function run(command: string, args: string[], options: RunOptions = {}): CommandResult {
   const env = { ...process.env, ...options.env };
   const invocation = resolveHostCommandInvocation(command, args, { env });
-  const usesPosixTimedWrapper = process.platform !== "win32" && options.timeoutMs !== undefined;
+  const timeoutMs = resolveOptionalHostCommandTimeoutMs(options.timeoutMs);
+  const usesPosixTimedWrapper = process.platform !== "win32" && timeoutMs !== undefined;
   const result = usesPosixTimedWrapper
-    ? runPosixTimedCommandSync(invocation, env, options)
+    ? runPosixTimedCommandSync(invocation, env, options, timeoutMs)
     : spawnSync(invocation.command, invocation.args, {
         cwd: options.cwd ?? repoRoot,
         encoding: "utf8",
@@ -399,7 +412,7 @@ export function run(command: string, args: string[], options: RunOptions = {}):
         maxBuffer: HOST_COMMAND_MAX_BUFFER_BYTES,
         stdio: options.quiet ? ["pipe", "pipe", "pipe"] : ["pipe", "pipe", "pipe"],
         shell: invocation.shell,
-        timeout: options.timeoutMs,
+        timeout: timeoutMs,
         windowsVerbatimArguments: invocation.windowsVerbatimArguments,
       });
 
@@ -421,7 +434,7 @@ export function run(command: string, args: string[], options: RunOptions = {}):
     wrapperTimedOut || (result.error as NodeJS.ErrnoException | undefined)?.code === "ETIMEDOUT";
   if (wrapperTimedOut && options.check !== false) {
     const error = new Error(
-      `${command} ${args.join(" ")} timed out after ${options.timeoutMs}ms`,
+      `${command} ${args.join(" ")} timed out after ${timeoutMs}ms`,
     ) as NodeJS.ErrnoException;
     error.code = "ETIMEDOUT";
     throw error;
@@ -495,7 +508,9 @@ function runPosixTimedCommandSync(
   invocation: HostCommandInvocation,
   env: NodeJS.ProcessEnv,
   options: RunOptions,
+  timeoutMs: number,
 ): SpawnSyncReturns<string> {
+  const wrapperTimeoutMs = addTimerTimeoutGraceMs(timeoutMs, HOST_COMMAND_WRAPPER_BACKSTOP_MS) ?? 1;
   const payload = JSON.stringify({
     args: invocation.args,
     command: invocation.command,
@@ -505,7 +520,7 @@ function runPosixTimedCommandSync(
     maxBufferBytes: HOST_COMMAND_MAX_BUFFER_BYTES,
     shell: invocation.shell,
     timeoutKillGraceMs: HOST_COMMAND_TIMEOUT_KILL_GRACE_MS,
-    timeoutMs: options.timeoutMs,
+    timeoutMs,
   });
   return spawnSync(process.execPath, ["-e", POSIX_TIMEOUT_WRAPPER], {
     cwd: options.cwd ?? repoRoot,
@@ -515,7 +530,7 @@ function runPosixTimedCommandSync(
     killSignal: "SIGKILL",
     maxBuffer: HOST_COMMAND_MAX_BUFFER_BYTES * 2 + HOST_COMMAND_WRAPPER_EXTRA_BUFFER_BYTES,
     stdio: ["pipe", "pipe", "pipe", "pipe"],
-    timeout: (options.timeoutMs ?? 0) + HOST_COMMAND_WRAPPER_BACKSTOP_MS,
+    timeout: wrapperTimeoutMs,
   });
 }
 
@@ -531,11 +546,12 @@ export async function runStreaming(
   return await new Promise((resolve, reject) => {
     const env = { ...process.env, ...options.env };
     const invocation = resolveHostCommandInvocation(command, args, { env });
+    const timeoutMs = resolveOptionalHostCommandTimeoutMs(options.timeoutMs);
     const logStream = options.logPath
       ? createWriteStream(options.logPath, { encoding: "utf8", flags: "w" })
       : undefined;
     let logStreamError: Error | undefined;
-    const detached = process.platform !== "win32" && options.timeoutMs != null;
+    const detached = process.platform !== "win32" && timeoutMs !== undefined;
     const child = spawn(invocation.command, invocation.args, {
       cwd: options.cwd ?? repoRoot,
       detached,
@@ -570,8 +586,8 @@ export async function runStreaming(
         return (error as NodeJS.ErrnoException).code === "EPERM";
       }
     };
-    const waitForStreamingProcessGroupExit = async (timeoutMs: number): Promise<boolean> => {
-      const deadlineAt = Date.now() + timeoutMs;
+    const waitForStreamingProcessGroupExit = async (timeoutBudgetMs: number): Promise<boolean> => {
+      const deadlineAt = Date.now() + timeoutBudgetMs;
       while (Date.now() < deadlineAt) {
         if (!streamingProcessGroupAlive()) {
           return true;
@@ -637,7 +653,7 @@ export async function runStreaming(
         }
       }, HOST_COMMAND_TIMEOUT_KILL_GRACE_MS);
     };
-    if (process.platform !== "win32" && options.timeoutMs != null) {
+    if (process.platform !== "win32" && timeoutMs !== undefined) {
       for (const signal of ["SIGHUP", "SIGINT", "SIGTERM"] as const) {
         const handler = (): void => {
           forwardedParentSignal ??= signal;
@@ -702,7 +718,7 @@ export async function runStreaming(
       }
     };
     const timer =
-      options.timeoutMs == null
+      timeoutMs === undefined
         ? undefined
         : setTimeout(() => {
             timedOut = true;
@@ -713,7 +729,7 @@ export async function runStreaming(
               HOST_COMMAND_STREAMING_TIMEOUT_KILL_GRACE_MS,
             );
             killTimer.unref();
-          }, options.timeoutMs);
+          }, timeoutMs);
 
     child.on("error", (error) => {
       if (timer) {
diff --git a/test/scripts/parallels-smoke-model.test.ts b/test/scripts/parallels-smoke-model.test.ts
index a3d3da0a993b..fb26aae0e051 100644
--- a/test/scripts/parallels-smoke-model.test.ts
+++ b/test/scripts/parallels-smoke-model.test.ts
@@ -17,6 +17,7 @@ import { tmpdir } from "node:os";
 import { basename, delimiter, join, win32 } from "node:path";
 import { setTimeout as delay } from "node:timers/promises";
 import { pathToFileURL } from "node:url";
+import { MAX_TIMER_TIMEOUT_MS } from "@openclaw/normalization-core/number-coercion";
 import { afterEach, beforeAll, describe, expect, it, vi } from "vitest";
 import {
   extractLastOpenClawVersionFromLog,
@@ -1466,6 +1467,16 @@ if (isPrlctl) {
     expect(result.stdout).toBeTypeOf("string");
   });
 
+  it("clamps oversized timed host command wrapper timeouts", () => {
+    const result = run(process.execPath, ["-e", "setTimeout(() => process.exit(0), 25);"], {
+      check: false,
+      quiet: true,
+      timeoutMs: MAX_TIMER_TIMEOUT_MS + 1,
+    });
+
+    expect(result.status).toBe(0);
+  });
+
   it.runIf(process.platform !== "win32")(
     "lets timed host command descendants drain before force kill",
     () => {
@@ -1684,6 +1695,21 @@ setInterval(() => {}, 1000);
     }
   });
 
+  it("clamps oversized streaming host command timeouts before arming timers", async () => {
+    const setTimeoutSpy = vi.spyOn(globalThis, "setTimeout");
+    try {
+      await expect(
+        runStreaming(process.execPath, ["-e", "setTimeout(() => process.exit(0), 25);"], {
+          quiet: true,
+          timeoutMs: MAX_TIMER_TIMEOUT_MS + 1,
+        }),
+      ).resolves.toBe(0);
+      expect(setTimeoutSpy).toHaveBeenCalledWith(expect.any(Function), MAX_TIMER_TIMEOUT_MS);
+    } finally {
+      setTimeoutSpy.mockRestore();
+    }
+  });
+
   it.runIf(process.platform !== "win32")(
     "lets timed streaming host command descendants drain before force kill",
     async () => {