diff --git a/htdocs/core/triggers/interface_95_modWebhook_WebhookTriggers.class.php b/htdocs/core/triggers/interface_95_modWebhook_WebhookTriggers.class.php
index 5044088c06d..77074431854 100644
--- a/htdocs/core/triggers/interface_95_modWebhook_WebhookTriggers.class.php
+++ b/htdocs/core/triggers/interface_95_modWebhook_WebhookTriggers.class.php
@@ -133,6 +133,14 @@ class InterfaceWebhookTriggers extends DolibarrTriggers
 					$nbPosts++;
 				} else {
 					$errormsg = "The WebHook for triggercode ".$action." failed to do the GET URL ".$tmpobject->url." with httpcode=".(!empty($response['http_code']) ? $response['http_code'] : "")." curl_error_no=".(!empty($response['curl_error_no']) ? $response['curl_error_no'] : "");
+					// getURLContent returns http_code 400 with an explanation in $response['content']
+					// when the host is rejected by the SSRF protection (private/reserved range, local
+					// network, metadata server, ...). Surface that explanation so the operator can
+					// either fix the target URL or enable $dolibarr_allow_localurl_for_webhooks in
+					// conf.php when the target is on a trusted local network.
+					if (empty($response['curl_error_no']) && !empty($response['http_code']) && $response['http_code'] == 400 && !empty($response['content'])) {
+						$errormsg .= " - ".$response['content'];
+					}
 					$errorforhistory ++;
 
 					if ($tmpobject->type == Target::TYPE_BLOCKING) {