From fbd3ef876ffde9a5c48a5c87eb88d7ab71b1b075 Mon Sep 17 00:00:00 2001
From: Matt Brophy <matt@brophy.org>
Date: Fri, 9 Jan 2026 12:27:36 -0500
Subject: [PATCH 1/2] Fix double slash normalization or useNavigate colon paths

---
 .changeset/blue-parrots-grin.md               |  5 +++++
 .../__tests__/resolvePath-test.tsx            | 16 ---------------
 packages/react-router/lib/router/utils.ts     | 20 ++++---------------
 3 files changed, 9 insertions(+), 32 deletions(-)
 create mode 100644 .changeset/blue-parrots-grin.md

diff --git a/.changeset/blue-parrots-grin.md b/.changeset/blue-parrots-grin.md
new file mode 100644
index 0000000000..6cb6da89a0
--- /dev/null
+++ b/.changeset/blue-parrots-grin.md
@@ -0,0 +1,5 @@
+---
+"react-router": patch
+---
+
+Fix double slash normalization for useNavigate colon urls
diff --git a/packages/react-router/__tests__/resolvePath-test.tsx b/packages/react-router/__tests__/resolvePath-test.tsx
index 22719de070..261e7f2119 100644
--- a/packages/react-router/__tests__/resolvePath-test.tsx
+++ b/packages/react-router/__tests__/resolvePath-test.tsx
@@ -1,22 +1,6 @@
 import { resolvePath } from "react-router";
 
 describe("resolvePath", () => {
-  it("does not touch with protocol-less absolute paths", () => {
-    expect(resolvePath("//google.com")).toMatchObject({
-      pathname: "//google.com",
-    });
-
-    expect(resolvePath("//google.com/../../path")).toMatchObject({
-      pathname: "//google.com/../../path",
-    });
-
-    expect(resolvePath("//google.com?q=query#hash")).toMatchObject({
-      pathname: "//google.com",
-      search: "?q=query",
-      hash: "#hash",
-    });
-  });
-
   it('resolves absolute paths irrespective of the "from" pathname', () => {
     expect(resolvePath("/search", "/inbox")).toMatchObject({
       pathname: "/search",
diff --git a/packages/react-router/lib/router/utils.ts b/packages/react-router/lib/router/utils.ts
index 4a4a79593e..41cc4be463 100644
--- a/packages/react-router/lib/router/utils.ts
+++ b/packages/react-router/lib/router/utils.ts
@@ -1603,23 +1603,11 @@ export function resolvePath(to: To, fromPathname = "/"): Path {
 
   let pathname: string;
   if (toPathname) {
-    if (isAbsoluteUrl(toPathname)) {
-      pathname = toPathname;
+    toPathname = toPathname.replace(/\/\/+/g, "/");
+    if (toPathname.startsWith("/")) {
+      pathname = resolvePathname(toPathname.substring(1), "/");
     } else {
-      if (toPathname.includes("//")) {
-        let oldPathname = toPathname;
-        toPathname = toPathname.replace(/\/\/+/g, "/");
-        warning(
-          false,
-          `Pathnames cannot have embedded double slashes - normalizing ` +
-            `${oldPathname} -> ${toPathname}`,
-        );
-      }
-      if (toPathname.startsWith("/")) {
-        pathname = resolvePathname(toPathname.substring(1), "/");
-      } else {
-        pathname = resolvePathname(toPathname, fromPathname);
-      }
+      pathname = resolvePathname(toPathname, fromPathname);
     }
   } else {
     pathname = fromPathname;

From 0571de614f3d38f7a84c842f79c5459b389da260 Mon Sep 17 00:00:00 2001
From: Matt Brophy <matt@brophy.org>
Date: Fri, 16 Jan 2026 10:15:10 -0500
Subject: [PATCH 2/2] Add test

---
 .../__tests__/resolvePath-test.tsx            | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/packages/react-router/__tests__/resolvePath-test.tsx b/packages/react-router/__tests__/resolvePath-test.tsx
index 261e7f2119..6a28d83e41 100644
--- a/packages/react-router/__tests__/resolvePath-test.tsx
+++ b/packages/react-router/__tests__/resolvePath-test.tsx
@@ -63,6 +63,32 @@ describe("resolvePath", () => {
     spy.mockRestore();
   });
 
+  it("handles relative paths with an embedded colon", () => {
+    expect(resolvePath("foo:bar", "/")).toMatchObject({
+      pathname: "/foo:bar",
+    });
+
+    expect(resolvePath("./foo:bar", "/")).toMatchObject({
+      pathname: "/foo:bar",
+    });
+
+    expect(resolvePath("../foo:bar", "/")).toMatchObject({
+      pathname: "/foo:bar",
+    });
+
+    expect(resolvePath("foo:bar", "/path")).toMatchObject({
+      pathname: "/path/foo:bar",
+    });
+
+    expect(resolvePath("./foo:bar", "/path")).toMatchObject({
+      pathname: "/path/foo:bar",
+    });
+
+    expect(resolvePath("../foo:bar", "/path")).toMatchObject({
+      pathname: "/foo:bar",
+    });
+  });
+
   it('ignores trailing slashes on the "from" pathname when resolving relative paths', () => {
     expect(resolvePath("../search", "/inbox/")).toMatchObject({
       pathname: "/search",