diff --git a/.changeset/lucky-tables-jam.md b/.changeset/lucky-tables-jam.md
new file mode 100644
index 000000000000..2b334b36f876
--- /dev/null
+++ b/.changeset/lucky-tables-jam.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+fix: prevent crawling empty urls (`![]()
`)
diff --git a/packages/kit/src/core/postbuild/crawl.js b/packages/kit/src/core/postbuild/crawl.js
index 255d6e443e65..fd1bd4c9e683 100644
--- a/packages/kit/src/core/postbuild/crawl.js
+++ b/packages/kit/src/core/postbuild/crawl.js
@@ -165,7 +165,7 @@ export function crawl(html) {
} else if (name === 'rel') {
rel = value;
} else if (name === 'src') {
- hrefs.push(value);
+ if (value) hrefs.push(value);
} else if (name === 'srcset') {
const candidates = [];
let insideURL = true;
@@ -183,7 +183,7 @@ export function crawl(html) {
candidates.push(value);
for (const candidate of candidates) {
const src = candidate.split(WHITESPACE)[0];
- hrefs.push(src);
+ if (src) hrefs.push(src);
}
}
} else {
diff --git a/packages/kit/src/core/postbuild/fixtures/basic-src/input.html b/packages/kit/src/core/postbuild/fixtures/basic-src/input.html
index 82c55c8f2780..52d4ee72b077 100644
--- a/packages/kit/src/core/postbuild/fixtures/basic-src/input.html
+++ b/packages/kit/src/core/postbuild/fixtures/basic-src/input.html
@@ -3,5 +3,6 @@
+ ![empty]()