diff --git a/contrib/xml2/xpath.c b/contrib/xml2/xpath.c
index f94b622d92..0fdf735faf 100644
--- a/contrib/xml2/xpath.c
+++ b/contrib/xml2/xpath.c
@@ -386,7 +386,7 @@ pgxml_xpath(text *document, xmlChar *xpath, xpath_workspace *workspace)
 			workspace->ctxt->node = xmlDocGetRootElement(workspace->doctree);
 
 			/* compile the path */
-			comppath = xmlXPathCompile(xpath);
+			comppath = xmlXPathCtxtCompile(workspace->ctxt, xpath);
 			if (comppath == NULL)
 				xml_ereport(xmlerrcxt, ERROR, ERRCODE_EXTERNAL_ROUTINE_EXCEPTION,
 							"XPath Syntax Error");
@@ -649,7 +649,7 @@ xpath_table(PG_FUNCTION_ARGS)
 						ctxt->node = xmlDocGetRootElement(doctree);
 
 						/* compile the path */
-						comppath = xmlXPathCompile(xpaths[j]);
+						comppath = xmlXPathCtxtCompile(ctxt, xpaths[j]);
 						if (comppath == NULL)
 							xml_ereport(xmlerrcxt, ERROR,
 										ERRCODE_EXTERNAL_ROUTINE_EXCEPTION,
diff --git a/src/backend/utils/adt/xml.c b/src/backend/utils/adt/xml.c
index 1a07876cd5..41b1a5c6b0 100644
--- a/src/backend/utils/adt/xml.c
+++ b/src/backend/utils/adt/xml.c
@@ -4448,7 +4448,13 @@ xpath_internal(text *xpath_expr_text, xmltype *data, ArrayType *namespaces,
 			}
 		}
 
-		xpathcomp = xmlXPathCompile(xpath_expr);
+		/*
+		 * Note: here and elsewhere, be careful to use xmlXPathCtxtCompile not
+		 * xmlXPathCompile.  In libxml2 2.13.3 and older, the latter function
+		 * fails to defend itself against recursion-to-stack-overflow.  See
+		 * https://gitlab.gnome.org/GNOME/libxml2/-/issues/799
+		 */
+		xpathcomp = xmlXPathCtxtCompile(xpathctx, xpath_expr);
 		if (xpathcomp == NULL || xmlerrcxt->err_occurred)
 			xml_ereport(xmlerrcxt, ERROR, ERRCODE_INTERNAL_ERROR,
 						"invalid XPath expression");
@@ -4819,7 +4825,10 @@ XmlTableSetRowFilter(TableFuncScanState *state, const char *path)
 
 	xstr = pg_xmlCharStrndup(path, strlen(path));
 
-	xtCxt->xpathcomp = xmlXPathCompile(xstr);
+	/* We require XmlTableSetDocument to have been done already */
+	Assert(xtCxt->xpathcxt != NULL);
+
+	xtCxt->xpathcomp = xmlXPathCtxtCompile(xtCxt->xpathcxt, xstr);
 	if (xtCxt->xpathcomp == NULL || xtCxt->xmlerrcxt->err_occurred)
 		xml_ereport(xtCxt->xmlerrcxt, ERROR, ERRCODE_SYNTAX_ERROR,
 					"invalid XPath expression");
@@ -4850,7 +4859,10 @@ XmlTableSetColumnFilter(TableFuncScanState *state, const char *path, int colnum)
 
 	xstr = pg_xmlCharStrndup(path, strlen(path));
 
-	xtCxt->xpathscomp[colnum] = xmlXPathCompile(xstr);
+	/* We require XmlTableSetDocument to have been done already */
+	Assert(xtCxt->xpathcxt != NULL);
+
+	xtCxt->xpathscomp[colnum] = xmlXPathCtxtCompile(xtCxt->xpathcxt, xstr);
 	if (xtCxt->xpathscomp[colnum] == NULL || xtCxt->xmlerrcxt->err_occurred)
 		xml_ereport(xtCxt->xmlerrcxt, ERROR, ERRCODE_DATA_EXCEPTION,
 					"invalid XPath expression");