diff --git a/src/jv_aux.c b/src/jv_aux.c
index 0a06117e91..a08ca88e72 100644
--- a/src/jv_aux.c
+++ b/src/jv_aux.c
@@ -417,6 +417,7 @@ jv jv_setpath(jv root, jv path, jv value) {
   // to null first.
   root = jv_set(root, jv_copy(pathcurr), jv_null());
   if (!jv_is_valid(root)) {
+    jv_free(subroot);
     jv_free(pathcurr);
     jv_free(pathrest);
     jv_free(value);
diff --git a/tests/jq.test b/tests/jq.test
index eabf836fa0..bde6c0a33c 100644
--- a/tests/jq.test
+++ b/tests/jq.test
@@ -2169,3 +2169,10 @@ try ltrimstr("x") catch "x", try rtrimstr("x") catch "x" | "ok"
 ["ko","endswith() requires string inputs"]
 ["ok",""]
 ["ko","endswith() requires string inputs"]
+
+
+# oss-fuzz #66061: setpath/2 leaks when indexing array with array
+
+try ["OK", setpath([[1]]; 1)] catch ["KO", .]
+[]
+["KO","Cannot update field at array index of array"]