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Dancer2-2.1.0
⭐ Starred 552 / Dancer2::Core::DSL
Security Advisories (1)
CVE-2026-13577 (2026-07-20)

Dancer2 versions through 2.1.0 for Perl generate insecure session ids when CSPRNG modules are unavailable. Dancer2::Core::Role::SessionFactory::generate_id silently falls back to a built-in rand-derived session id when both Math::Random::ISAAC::XS and Crypt::URandom are unavailable. 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::Core::DSL - Dancer2's Domain Specific Language (DSL)

VERSION

version 2.1.0

FUNCTIONS

setting

Lets you define settings and access them:

setting('foo' => 42);
setting('foo' => 42, 'bar' => 43);
my $foo=setting('foo');

If settings were defined returns number of settings.

set ()

alias for setting:

set('foo' => '42');
my $port=set('port');

SEE ALSO

http://advent.perldancer.org/2010/18

AUTHOR

Dancer Core Developers

COPYRIGHT AND LICENSE

This software is copyright (c) 2026 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.