/ 
HTML-FormFu-2.07
/ HTML::FormFu::Element::Number
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::Number - Number element with formatting

VERSION

version 2.07

SYNOPSIS

---
elements:
  - type: Number
    locale: de_DE
    precision: 2
    trailing_zeroes: 1

DESCRIPTION

This element formats numbers according to the current locale. You can set this locale either by setting $form->locale or by setting the element's locale. If none of them is set the element uses the system's locale.

METHODS

locale

Set the locale for this element. The format of the number is chosen according to this locale.

precision

Set the precision for the number. Defaults to 2.

trailing_zeroes

If this is set to 1 the number has trailing zeroes. Defaults to 0.

CHANGED BEHAVIOUR AS OF VERSION 0.09011

Previous to version 0.09011, this element generated an input field with type="number" attribute which was not valid xhtml. Neither was the formatted numbers valid html5 - which expects the value to be a floating-point number. This element now generates a type="text" attribute.

SEE ALSO

HTML::FormFu::Deflator::FormatNumber

HTML::FormFu::Filter::FormatNumber

"locale" in HTML::FormFu

AUTHOR

Moritz Onken onken at houseofdesign.de

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.