diff -up vim80/src/getchar.c.cve vim80/src/getchar.c
--- vim80/src/getchar.c.cve 2019-06-14 13:46:17.269523985 +0200
+++ vim80/src/getchar.c 2019-06-14 13:46:58.427169288 +0200
@@ -1418,6 +1418,12 @@ openscript(
EMSG(_(e_nesting));
return;
}
+
+ // Disallow sourcing a file in the sandbox, the commands would be executed
+ // later, possibly outside of the sandbox.
+ if (check_secure())
+ return;
#ifdef FEAT_EVAL
if (ignore_script)
/* Not reading from script, also don't open one. Warning message? */