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Dancer2-2.1.0
⭐ Starred 552 / Dancer2::Serializer::YAML
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::Serializer::YAML - Serializer for handling YAML data

VERSION

version 2.1.0

DESCRIPTION

This is a serializer engine that allows you to turn Perl data structures into YAML output and vice-versa.

ATTRIBUTES

content_type

Returns 'text/x-yaml'

METHODS

serialize($content)

Serializes a data structure to a YAML structure.

deserialize($content)

Deserializes a YAML structure to a data structure.

FUNCTIONS

fom_yaml($content)

This is an helper available to transform a YAML data structure to a Perl data structures.

to_yaml($content)

This is an helper available to transform a Perl data structure to YAML.

Calling this function will not trigger the serialization's hooks.

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.