1 files changed, 1 insertions, 0 deletions
diff --git a/io.c b/io.c
index e2de4a69b1..44f79a735f 100644
--- a/io.c
+++ b/io.c
@@ -2114,6 +2114,7 @@ io_read(int argc, VALUE *argv, VALUE io)
         return Qnil;
     }
     rb_str_resize(str, n);
+    OBJ_TAINT(str);
 
     return str;
 }