/ 
HTML-FormFu-2.07
/ HTML::FormFu::Element::URL
Security Advisories (1)
CVE-2026-19873 (2026-08-31)

HTML::FormFu versions through 2.08 for Perl allow resource exhaustion via an unbounded repeat count from the query string in Repeatable elements. When a Repeatable element has counter_name set, its process method reads the repeat count from the named query string parameter, checks only that it is a positive integer, and passes it to repeat, which deep-clones the element's child subtree once per iteration. Nothing caps the value, and no attribute lets an application impose a limit. The count is read on every request, before the form decides whether it was submitted, so a plain GET reaches the clone loop with no credentials, no session and no request body. Nesting multiplies: a Repeatable inside a Repeatable takes a counter at each level, so an outer and an inner value of 100 build 10,000 clones. Once the form is submitted, each cloned field's constraints scan the whole element tree in _find_field_value, so cost grows faster than linearly with the count. A single request exhausts memory and CPU. The latest release on CPAN is 2.07, from 2018. Version 2.08 exists only in the git repository.

NAME

HTML::FormFu::Element::URL - HTML5 URL form field

VERSION

version 2.07

SYNOPSIS

my $element = $form->element( URL => 'foo' );

# no need to add a separate constraint

DESCRIPTION

HTML5 URL form field which provides native client-side validation in modern browsers.

Creates an input field with <type="url">.

Also sets the pattern attribute to restrict the client-side validation to only our desired schemes (http and/or https).

This element automatically adds a Regex constraint, so you don't have to.

If neither "http_only" or "https_only" are set, the constraint allows any HTTP or HTTPS url.

METHODS

http_only

https_only

message

Arguments: $string

Set the error message on the Regex constraint which is automatically added.

message_xml

Arguments: $string

If you don't want your error message to be XML-escaped, use the "message_xml" method instead of "message".

message_loc

Arguments: $localization_key

Set the error message using a L10N key.

SEE ALSO

Is a sub-class of, and inherits methods from HTML::FormFu::Role::Element::Input, HTML::FormFu::Role::Element::Field, HTML::FormFu::Element.

HTML::FormFu

AUTHOR

Carl Franks, cfranks@cpan.org

LICENSE

This library is free software, you can redistribute it and/or modify it under the same terms as Perl itself.

AUTHOR

Carl Franks <cpan@fireartist.com>

COPYRIGHT AND LICENSE

This software is copyright (c) 2018 by Carl Franks.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.