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Dancer-1.3522
⭐ Starred 738 / Dancer::Serializer
Security Advisories (1)
CVE-2026-5080 (2026-04-30)

Dancer::Session::Abstract versions through 1.3522 for Perl generates session ids insecurely. The session id is generated from summing the character codepoints of the absolute pathname with the process id, the epoch time and calls to the built-in rand() function to return a number between 0 and 999-billion, and concatenating that result three times. The path name might be known or guessed by an attacker, especially for applications known to be written using Dancer with standard installation locations. The epoch time can be guessed by an attacker, and may be leaked in the HTTP header. The process id comes from a small set of numbers, and workers may have sequential process ids. The built-in rand() function is seeded with 32-bits and is considered unsuitable for security applications. Predictable session ids could allow an attacker to gain access to systems.

NAME

Dancer::Serializer - serializer wrapper for Dancer

VERSION

version 1.3522

DESCRIPTION

This module is the wrapper that provides support for different serializers.

USAGE

Configuration

The serializer configuration variable tells Dancer which serializer to use to deserialize request and serialize response.

You change it either in your config.yml file:

serializer: "YAML"

Or in the application code:

# setting JSON as the default serializer
set serializer => 'JSON';

In your routes you can access parameters just like any route.

When in a route you return a Perl data structure, it will be serialized automatically to the respective serialized engine (for instance, JSON).

For PUT and POST methods you can access the request->body as a string, and you can unserialize it, if you really need to. If your content type is recognized by the serializer, request->body will be unserialized automatically, and it will be available as a standard parameter.

For instance, if you call

curl -X POST -H 'Content-Type: application/json' -d '{"id":"bar"}' /foo

your foo route can do something like:

post "/foo" => {
   my $id = param('id'); # gets "bar"
   #  ...
}

AUTHORS

This module has been written by Alexis Sukrieh and Franck Cuny. See the AUTHORS file that comes with this distribution for details.

LICENSE

This module is free software and is released under the same terms as Perl itself.

SEE ALSO

See Dancer for details about the complete framework.

AUTHOR

Dancer Core Developers

COPYRIGHT AND LICENSE

This software is copyright (c) 2010 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.