diff --git a/src/parse.ts b/src/parse.ts
index b2a2e7e0..73019b76 100644
--- a/src/parse.ts
+++ b/src/parse.ts
@@ -72,7 +72,7 @@ export function parseURL(input = "", defaultProto?: string): ParsedURL {
   const [, protocol = "", auth, hostAndPath = ""] =
     input
       .replace(/\\/g, "/")
-      .match(/^[\s\0]*([\w+.-]{2,}:)?\/\/([^/@]+@)?(.*)/) || [];
+      .match(/^[\s\0]*([\w+.-]{2,}:)?\/\/([^/?#]*@)?(.*)/) || [];
 
   // eslint-disable-next-line prefer-const
   let [, host = "", path = ""] = hostAndPath.match(/([^#/?]*)(.*)?/) || [];
diff --git a/test/parse.test.ts b/test/parse.test.ts
index ba72667a..986c355d 100644
--- a/test/parse.test.ts
+++ b/test/parse.test.ts
@@ -294,3 +294,71 @@ describe("parseFilename", () => {
     });
   }
 });
+
+describe("parseURL authority boundaries", () => {
+  test.each([
+    [
+      "http://example.com?email=user@example.org",
+      "?email=user@example.org",
+      "",
+    ],
+    ["https://example.com#user@example.org", "", "#user@example.org"],
+    [
+      "//example.com?email=user@example.org#fragment",
+      "?email=user@example.org",
+      "#fragment",
+    ],
+  ])("keeps @ after the authority boundary in %s", (input, search, hash) => {
+    expect(parseURL(input)).toMatchObject({
+      protocol: input.startsWith("//") ? "" : input.split("//")[0],
+      auth: "",
+      host: "example.com",
+      pathname: "",
+      search,
+      hash,
+    });
+  });
+
+  test("preserves actual user info before query and fragment", () => {
+    expect(
+      parseURL(
+        "https://user:pass@example.com?email=user@example.org#user@example.org",
+      ),
+    ).toMatchObject({
+      protocol: "https:",
+      auth: "user:pass",
+      host: "example.com",
+      pathname: "",
+      search: "?email=user@example.org",
+      hash: "#user@example.org",
+    });
+  });
+});
+
+describe("parseURL user-info separator", () => {
+  test.each([
+    ["https://user@team@example.com", "user@team", "", ""],
+    [
+      "https://user@team@example.com?email=user@example.org",
+      "user@team",
+      "?email=user@example.org",
+      "",
+    ],
+    [
+      "https://user@team@example.com#user@example.org",
+      "user@team",
+      "",
+      "#user@example.org",
+    ],
+    ["https://@example.com", "", "", ""],
+  ])("uses the last authority @ in %s", (input, auth, search, hash) => {
+    expect(parseURL(input)).toMatchObject({
+      protocol: "https:",
+      auth,
+      host: "example.com",
+      pathname: "",
+      search,
+      hash,
+    });
+  });
+});