From e0038e109673f7ae78a4368aab7c8715b3d88ce9 Mon Sep 17 00:00:00 2001
From: Viktor Szakats <commit@vsz.me>
Date: Sat, 21 Mar 2026 01:31:29 +0100
Subject: [PATCH] tool_operhlp: propagate low-level OOM in
 `add_file_name_to_url()`

Bug: https://github.com/curl/curl/pull/21011#discussion_r2961678069

Closes #21043
---
 src/tool_operhlp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/tool_operhlp.c b/src/tool_operhlp.c
index 79ddd905f4..5c50597393 100644
--- a/src/tool_operhlp.c
+++ b/src/tool_operhlp.c
@@ -102,6 +102,10 @@ CURLcode add_file_name_to_url(CURL *curl, char **inurlp, const char *filename)
       goto out;
     }
     uerr = curl_url_get(uh, CURLUPART_QUERY, &query, 0);
+    if(uerr == CURLUE_OUT_OF_MEMORY) {
+      result = urlerr_cvt(uerr);
+      goto out;
+    }
     if(!uerr && query) {
       curl_free(query);
       result = CURLE_OK;