diff --git a/src/cli/progress.test.ts b/src/cli/progress.test.ts
index b729a88c669..82a356d2eed 100644
--- a/src/cli/progress.test.ts
+++ b/src/cli/progress.test.ts
@@ -1,4 +1,5 @@
 import { describe, expect, it, vi } from "vitest";
+import { MAX_TIMER_TIMEOUT_MS } from "../shared/number-coercion.js";
 import { createCliProgress, shouldUseInteractiveProgressSpinner } from "./progress.js";
 
 function withStdinIsRaw<T>(isRaw: boolean, run: () => T): T {
@@ -130,4 +131,25 @@ describe("cli progress", () => {
 
     expect(firstWrites).toStrictEqual([]);
   });
+
+  it("clamps oversized delayed progress timers", () => {
+    const stream = {
+      isTTY: true,
+      write: vi.fn(),
+    } as unknown as NodeJS.WriteStream;
+    const setTimeoutSpy = vi.spyOn(globalThis, "setTimeout");
+    try {
+      const progress = createCliProgress({
+        label: "Delayed",
+        stream,
+        fallback: "line",
+        delayMs: Number.MAX_SAFE_INTEGER,
+      });
+      progress.done();
+
+      expect(setTimeoutSpy).toHaveBeenCalledWith(expect.any(Function), MAX_TIMER_TIMEOUT_MS);
+    } finally {
+      setTimeoutSpy.mockRestore();
+    }
+  });
 });
diff --git a/src/cli/progress.ts b/src/cli/progress.ts
index bc3389f5288..d7c74b98dfb 100644
--- a/src/cli/progress.ts
+++ b/src/cli/progress.ts
@@ -9,6 +9,7 @@ import {
   unregisterActiveProgressLine,
 } from "../../packages/terminal-core/src/progress-line.js";
 import { theme } from "../../packages/terminal-core/src/theme.js";
+import { resolveTimerTimeoutMs } from "../shared/number-coercion.js";
 
 const DEFAULT_DELAY_MS = 0;
 let activeProgress = 0;
@@ -67,7 +68,7 @@ export function createCliProgress(options: ProgressOptions): ProgressReporter {
     return noopReporter;
   }
 
-  const delayMs = typeof options.delayMs === "number" ? options.delayMs : DEFAULT_DELAY_MS;
+  const delayMs = resolveTimerTimeoutMs(options.delayMs, DEFAULT_DELAY_MS, 0);
   const canOsc = isTty && supportsOscProgress(process.env, isTty);
   const stdinIsRaw = process.stdin.isRaw;
   const allowSpinner = shouldUseInteractiveProgressSpinner({