diff --git a/.changeset/breezy-waves-camp.md b/.changeset/breezy-waves-camp.md
new file mode 100644
index 0000000000..a324706d9c
--- /dev/null
+++ b/.changeset/breezy-waves-camp.md
@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: validate form inside a form
diff --git a/packages/svelte/src/compiler/phases/2-analyze/validation.js b/packages/svelte/src/compiler/phases/2-analyze/validation.js
index 51bb4d85fd..e54828375e 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/validation.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/validation.js
@@ -568,6 +568,17 @@ const validation = {
}
}
+ // can't add form to interactive elements because those are also used by the parser
+ // to check for the last auto-closing parent.
+ if (node.name === 'form') {
+ const path = context.path;
+ for (let parent of path) {
+ if (parent.type === 'RegularElement' && parent.name === 'form') {
+ e.node_invalid_placement(node, `<${node.name}>`, parent.name);
+ }
+ }
+ }
+
if (interactive_elements.has(node.name)) {
const path = context.path;
for (let parent of path) {
diff --git a/packages/svelte/tests/validator/samples/invalid-node-placement-4/errors.json b/packages/svelte/tests/validator/samples/invalid-node-placement-4/errors.json
new file mode 100644
index 0000000000..8b2e2e67ba
--- /dev/null
+++ b/packages/svelte/tests/validator/samples/invalid-node-placement-4/errors.json
@@ -0,0 +1,14 @@
+[
+ {
+ "code": "node_invalid_placement",
+ "message": "