--- /dev/null
+diff --git a/scripts/Dpkg/Source/Package/V3/quilt.pm b/scripts/Dpkg/Source/Package/V3/quilt.pm
+--- a/scripts/Dpkg/Source/Package/V3/quilt.pm
++++ b/scripts/Dpkg/Source/Package/V3/quilt.pm
+@@ -123,6 +123,7 @@ sub read_patch_list {
+ }
+ }
+ next if $opts{"skip_auto"} and $_ eq $auto_patch;
++ error(_g("%s contains an insecure path: %s"), $file, $_) if m{(^|/)\.\./};
+ push @patches, $_;
+ }
+ close(SERIES);