diff --git a/sdk/typescript/src/cli.ts b/sdk/typescript/src/cli.ts
index 30dc6f4..c389ab6 100644
--- a/sdk/typescript/src/cli.ts
+++ b/sdk/typescript/src/cli.ts
@@ -2877,7 +2877,7 @@ function scanScope(arguments_: ScanArguments): string | null {
         isAbsolute(path) ||
         /^[A-Za-z]:\//u.test(portable) ||
         portable.startsWith("//")
-          ? portable.split("/").at(-1) ?? portable
+          ? basename(portable) || portable
           : portable;
       return redactedErrorMessage(
         scoped.replaceAll(/[\u0000-\u001F\u007F]/gu, " "),
diff --git a/sdk/typescript/tests-ts/cli.test.ts b/sdk/typescript/tests-ts/cli.test.ts
index d16b6db..14afe94 100644
--- a/sdk/typescript/tests-ts/cli.test.ts
+++ b/sdk/typescript/tests-ts/cli.test.ts
@@ -2538,6 +2538,29 @@ describe("CLI", () => {
     expect(stderr.text()).not.toContain("% complete");
   });
 
+  test("preserves directory names for absolute scan paths with trailing separators", async () => {
+    const stdout = capture();
+    const stderr = capture();
+
+    expect(
+      await main(
+        [
+          "scan",
+          ".",
+          "--path",
+          "/synthetic-parent/trailing-directory/",
+          "--json",
+        ],
+        stdout.stream,
+        stderr.stream,
+        dependencies(),
+      ),
+    ).toBe(0);
+    expect(JSON.parse(stdout.text())).toEqual(fakeResult().toJSON());
+    expect(stderr.text()).toContain("Running scan: trailing-directory");
+    expect(stderr.text()).not.toContain("synthetic-parent");
+  });
+
   test("prints a truthful completion summary without changing JSON results", async () => {
     const stdout = capture();
     const stderr = capture();