diff --git a/db/drivers/dbf/table.c b/db/drivers/dbf/table.c
index 9b829f22ddc..b827ccc7db7 100644
--- a/db/drivers/dbf/table.c
+++ b/db/drivers/dbf/table.c
@@ -40,6 +40,9 @@
 /* add table to database */
 int add_table(char *table, char *name)
 {
+    int res;
+    size_t buf_s;
+
     G_debug(2, "add_table(): table = %s name = %s", table, name);
 
     if (db.atables == db.ntables) {
@@ -49,11 +52,18 @@ int add_table(char *table, char *name)
 
     strcpy(db.tables[db.ntables].name, table);
 
+    buf_s = sizeof(db.tables[db.ntables].file);
 #ifdef __MINGW32__
-    sprintf(db.tables[db.ntables].file, "%s\\%s", db.name, name);
+    res = snprintf(db.tables[db.ntables].file, buf_s, "%s\\%s", db.name, name);
 #else
-    sprintf(db.tables[db.ntables].file, "%s/%s", db.name, name);
+    res = snprintf(db.tables[db.ntables].file, buf_s, "%s/%s", db.name, name);
 #endif
+    if (res >= buf_s) {
+        db_d_append_error(_("Unable to add table %s to %s. "
+                            "The file path is too long."),
+                          name, db.name);
+        return DB_FAILED;
+    }
 
     db.tables[db.ntables].alive = TRUE;
     db.tables[db.ntables].described = FALSE;
diff --git a/display/d.legend.vect/main.c b/display/d.legend.vect/main.c
index f895664a85d..72989a23cb2 100644
--- a/display/d.legend.vect/main.c
+++ b/display/d.legend.vect/main.c
@@ -251,8 +251,6 @@ int main(int argc, char **argv)
     if (opt_input->answer) {
         sep = G_option_to_separator(opt_sep);
         file_name = opt_input->answer;
-        if (!file_name)
-            G_fatal_error(_("Unable to open input file <%s>"), file_name);
     }
     else {
         sep = "|";
diff --git a/display/d.legend/draw.c b/display/d.legend/draw.c
index d1350490043..1e7c6807084 100644
--- a/display/d.legend/draw.c
+++ b/display/d.legend/draw.c
@@ -50,7 +50,7 @@ void draw(const char *map_name, int maptype, int color, int thin, int lines,
     int x0, x1, y0, y1, xyTemp;
     int SigDigits;
     unsigned int MaxLabelLen;
-    char DispFormat[5]; /*  %.Xf\0  */
+    char DispFormat[6]; /*  %.Xf\0  */
     double maxCat;
     int horiz;
     char *units_bottom;
@@ -280,8 +280,14 @@ void draw(const char *map_name, int maptype, int color, int thin, int lines,
         if (horiz)
             sprintf(DispFormat, "%%d");
         else {
-            if (maxCat > 0.0)
-                sprintf(DispFormat, "%%%dd", (int)(log10(fabs(maxCat))) + 1);
+            if (maxCat > 0.0) {
+                size_t b_s = sizeof(DispFormat);
+                int log_maxCat = (int)(log10(fabs(maxCat))) + 1;
+                if (snprintf(DispFormat, b_s, "%%%dd", log_maxCat) >= b_s)
+                    G_fatal_error(
+                        _("Failed to create format string with maxCat=%f."),
+                        maxCat);
+            }
             else
                 sprintf(DispFormat, "%%2d");
         }
diff --git a/raster/r.out.pov/main.c b/raster/r.out.pov/main.c
index e9bfe179881..ee601f97e05 100644
--- a/raster/r.out.pov/main.c
+++ b/raster/r.out.pov/main.c
@@ -158,7 +158,7 @@ int main(int argc, char *argv[])
 
     outfilename = parm.tga->answer;
     if (outfilename == NULL)
-        G_fatal_error(_("Invalid output filename <%s>"), outfilename);
+        G_fatal_error(_("Invalid output filename"));
 
     if (NULL == (outf = fopen(outfilename, "wb")))
         G_fatal_error(_("Unable to open output file <%s>"), outfilename);
diff --git a/raster/r.sim/simlib/input.c b/raster/r.sim/simlib/input.c
index 535742ccd26..10a2a332f11 100644
--- a/raster/r.sim/simlib/input.c
+++ b/raster/r.sim/simlib/input.c
@@ -321,9 +321,8 @@ int input_data(void)
         cchez = create_float_matrix(rows, cols, manin_val);
     }
     else {
-        G_fatal_error(_("Raster map <%s> not found, and manin_val undefined, "
-                        "choose one to be allowed to process"),
-                      manin);
+        G_fatal_error(_("Manning's n raster map not found and manin_val "
+                        "undefined, choose one to be allowed to process"));
     }
 
     /* Rain: read rain map or use a single value for all cells */