diff --git a/src/UrlParams.ts b/src/UrlParams.ts
index f4ea840de..773aa4121 100644
--- a/src/UrlParams.ts
+++ b/src/UrlParams.ts
@@ -19,6 +19,7 @@ import { Config } from "./config/Config";
 import { type EncryptionSystem } from "./e2ee/sharedKeyManagement";
 import { E2eeType } from "./e2ee/e2eeType";
 import { platform } from "./Platform";
+import { redact } from "./utils/redact";
 
 interface RoomIdentifier {
   roomAlias: string | null;
@@ -494,7 +495,7 @@ export const computeUrlParams = (search = "", hash = ""): UrlParams => {
     "intent:",
     intent,
     "\nproperties:",
-    properties,
+    redact(properties, "password"),
     "configuration:",
     configuration,
   );
diff --git a/src/utils/redact.test.ts b/src/utils/redact.test.ts
new file mode 100644
index 000000000..977b5ebc0
--- /dev/null
+++ b/src/utils/redact.test.ts
@@ -0,0 +1,58 @@
+/*
+Copyright 2026 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import { expect, test } from "vitest";
+
+import { redact } from "./redact";
+
+test("empty object", () => {
+  expect(redact({})).toEqual({});
+});
+
+test("no keys", () => {
+  expect(redact({ foo: "bar" })).toEqual({ foo: "bar" });
+});
+
+test("redact one key", () => {
+  expect(redact({ foo: "bar" }, "foo")).toEqual({ foo: "<redacted>" });
+});
+
+test("redact two keys", () => {
+  expect(redact({ foo: "bar", bar: "foo" }, "foo", "bar")).toEqual({
+    foo: "<redacted>",
+    bar: "<redacted>",
+  });
+});
+
+test("no redaction of unrelated keys", () => {
+  expect(redact({ foo: "bar", bar: "foo" }, "foo")).toEqual({
+    foo: "<redacted>",
+    bar: "foo",
+  });
+});
+
+test("no redaction of missing keys", () => {
+  expect(
+    redact({ foo: "bar" } as { foo: string; bar: string | undefined }, "bar"),
+  ).toEqual({
+    foo: "bar",
+  });
+});
+
+test("no redaction of null values", () => {
+  expect(redact({ foo: "bar", bar: null }, "bar")).toEqual({
+    foo: "bar",
+    bar: null,
+  });
+});
+
+test("no redaction of undefined values", () => {
+  expect(redact({ foo: "bar", bar: undefined }, "bar")).toEqual({
+    foo: "bar",
+    bar: undefined,
+  });
+});
diff --git a/src/utils/redact.ts b/src/utils/redact.ts
new file mode 100644
index 000000000..9a3ea9090
--- /dev/null
+++ b/src/utils/redact.ts
@@ -0,0 +1,25 @@
+/*
+Copyright 2026 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+/**
+ * Redacts properties in the supplied object by replacing them with
+ * a constant value.
+ * @param obj Object in which to perform redaction
+ * @param keys Keys to be redacted in the object
+ * @returns A new object with the specified properties redacted
+ */
+export function redact<T extends object>(
+  obj: T,
+  ...keys: (keyof T)[]
+): Record<keyof T, unknown> {
+  const result: Record<keyof T, unknown> = { ...obj };
+  for (const key of keys)
+    if (key in result && result[key] != null) {
+      result[key] = "<redacted>";
+    }
+  return result;
+}