diff --git a/app/server/modules/volumes/__tests__/volumes.service.test.ts b/app/server/modules/volumes/__tests__/volumes.service.test.ts
new file mode 100644
index 00000000..d852e768
--- /dev/null
+++ b/app/server/modules/volumes/__tests__/volumes.service.test.ts
@@ -0,0 +1,48 @@
+import { test, describe, expect } from "bun:test";
+import { volumeService } from "../volume.service";
+import { db } from "~/server/db/db";
+import { volumesTable } from "~/server/db/schema";
+import { randomUUID } from "node:crypto";
+import * as fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { createTestSession } from "~/test/helpers/auth";
+import { withContext } from "~/server/core/request-context";
+
+describe("volumeService security", () => {
+	describe("path traversal", () => {
+		test("should reject traversal outside the volume root in listFiles", async () => {
+			const { organizationId, user } = await createTestSession();
+			const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "zerobyte-vol-svc-"));
+			const volumePath = path.join(tempRoot, "vol");
+			const secretPath = path.join(tempRoot, "volume-secret");
+
+			await fs.mkdir(volumePath, { recursive: true });
+			await fs.mkdir(secretPath, { recursive: true });
+			await fs.writeFile(path.join(secretPath, "secret.txt"), "top secret", "utf-8");
+
+			const [volume] = await db
+				.insert(volumesTable)
+				.values({
+					shortId: randomUUID().slice(0, 8),
+					name: `test-vol-${randomUUID().slice(0, 8)}`,
+					type: "directory",
+					status: "mounted",
+					config: { backend: "directory", path: volumePath },
+					autoRemount: true,
+					organizationId,
+				})
+				.returning();
+
+			try {
+				await withContext({ organizationId, userId: user.id }, async () => {
+					const traversalPath = `../${path.basename(secretPath)}`;
+
+					expect(volumeService.listFiles(volume.id, traversalPath)).rejects.toThrow("Invalid path");
+				});
+			} finally {
+				await fs.rm(tempRoot, { recursive: true, force: true });
+			}
+		});
+	});
+});
diff --git a/app/server/modules/volumes/volume.service.ts b/app/server/modules/volumes/volume.service.ts
index 70c0f0d9..d76a9cea 100644
--- a/app/server/modules/volumes/volume.service.ts
+++ b/app/server/modules/volumes/volume.service.ts
@@ -329,7 +329,9 @@ const listFiles = async (idOrShortId: string | number, subPath?: string) => {
 	const requestedPath = subPath ? path.join(volumePath, subPath) : volumePath;
 
 	const normalizedPath = path.normalize(requestedPath);
-	if (!normalizedPath.startsWith(volumePath)) {
+	const relative = path.relative(volumePath, normalizedPath);
+
+	if (relative.startsWith("..") || path.isAbsolute(relative)) {
 		throw new InternalServerError("Invalid path");
 	}