/ 
Dancer2-0.203001
⭐ Starred 552 / Dancer2::Template::Tiny
Security Advisories (2)
CPANSA-Dancer2-2018-01 (2018-01-30)

There is a potential RCE with regards to Storable. We have added session ID validation to the session engine so that session backends based on Storable can reject malformed session IDs that may lead to exploitation of the RCE.

CVE-2026-13577 (2026-07-20)

Dancer2 versions through 2.1.0 for Perl generate insecure session ids when required CSPRNG modules are unavailable. Dancer2::Core::Role::SessionFactory::generate_id silently falls back to a built-in rand-derived session id unless both Math::Random::ISAAC::XS and Crypt::URandom are available. The fallback session id is generated from a SHA-1 hash of a call to the built-in rand function, the absolute path of the Dancer2::Core::Role::SessionFactory module, an internal counter, the process id, the module instance memory address, and a shuffled string of characters (using the List::Util::shuffle function, which also uses the built-in rand function). These are all low-entropy and easily guessed sources. The built-in rand() function is seeded with 32-bits and considered unsuitable for security applications. Predictable session ids could allow an attacker to gain access to systems.

NAME

Dancer2::Template::Tiny - Template::Tiny engine for Dancer2

VERSION

version 0.203001

SYNOPSIS

This template engine allows you to use Template::Tiny in Dancer2.

Template::Tiny is an implementation of a subset of Template::Toolkit (the major parts) which takes much less memory and is faster. If you're only using the main functions of Template::Toolkit, you could use Template::Tiny. You can also seamlessly move back to Template::Toolkit whenever you want.

However, Dancer2 uses a modified version of Template::Tiny, which is Dancer2::Template::Implementation::ForkedTiny. It adds 2 features :

  • opening and closing tag are now configurable

  • CodeRefs are evaluated and their results is inserted in the result.

You can read more on Dancer2::Template::Implementation::ForkedTiny.

To use this engine, all you need to configure in your Dancer2's config.yaml:

template: "tiny"

Of course, you can also set this while working using set:

# code code code
set template => 'tiny';

Since Dancer2 has internal support for a wrapper-like option with the layout configuration option, you can have a Template::Toolkit-like WRAPPER even though Template::Tiny doesn't really support it.

METHODS

render($template, \%tokens)

Renders the template. The first arg is a filename for the template file or a reference to a string that contains the template. The second arg is a hashref for the tokens that you wish to pass to Template::Toolkit for rendering.

SEE ALSO

Dancer2, Dancer2::Core::Role::Template, Template::Tiny, Dancer2::Template::Implementation::ForkedTiny.

AUTHOR

Dancer Core Developers

COPYRIGHT AND LICENSE

This software is copyright (c) 2016 by Alexis Sukrieh.

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