https://github.com/php/php-src/commit/67259e4
--- php-src/ext/xml/compat.c.orig	2025-03-29 11:04:03.000000000 -0600
+++ php-src/ext/xml/compat.c	2025-03-29 16:00:42.000000000 -0600
@@ -375,7 +375,7 @@ _get_entity(void *user, const xmlChar *name)
 		if (ret == NULL)
 			ret = xmlGetDocEntity(parser->parser->myDoc, name);

-		if (ret == NULL || (parser->parser->instate != XML_PARSER_ENTITY_VALUE && parser->parser->instate != XML_PARSER_ATTRIBUTE_VALUE)) {
+ 		if (ret == NULL || parser->parser->instate == XML_PARSER_CONTENT) {
 			if (ret == NULL || ret->etype == XML_INTERNAL_GENERAL_ENTITY || ret->etype == XML_INTERNAL_PARAMETER_ENTITY || ret->etype == XML_INTERNAL_PREDEFINED_ENTITY) {
 				/* Predefined entities will expand unless no cdata handler is present */
 				if (parser->h_default && ! (ret && ret->etype == XML_INTERNAL_PREDEFINED_ENTITY && parser->h_cdata)) {