/ 
OIDC-Lite-0.01
/ OIDC::Lite::Server::Endpoint::Registration
Security Advisories (1)
CVE-2026-13089 (2026-07-22)

OIDC::Lite versions through 0.12.1 for Perl allow ID Token signature verification bypass via a token-controlled algorithm allowlist in verify. When the caller does not pin an algorithm, OIDC::Lite::Model::IDToken::verify sets $self->alg($self->header->{alg}) from the token's own header and then calls decode_jwt(token, key, 1, [$self->alg]), handing JSON::WebToken an accepted-algorithm allowlist taken from the untrusted token. A token with alg=none yields ['none'], so decode_jwt returns the claims with no signature check, and a token with alg=HS256 is verified with the RP's RSA public key as the HMAC secret (RS to HS confusion). The ID Token is the OpenID Connect authentication assertion delivered to the Relying Party. Any caller that verifies an ID Token through the unpinned load(token)->verify path, or load(token, key) with only the key pinned, accepts a forged token carrying attacker-chosen claims such as sub and is authenticated as any user. Passing an explicit algorithm so $self->alg is already set bypasses the header-derived allowlist and is not affected. Note that the latest version uploaded to CPAN is 0.10. Later versions are available in the git repository.

NAME

OIDC::Lite::Server::Endpoint::Registration - registration endpoint PSGI application

SYNOPSIS

registration_endpoint.psgi

use strict;
use warnings;
use Plack::Builder;
use OIDC::Lite::Server::Endpoint::Registration;
use MyDataHandlerClass;

builder {
    my $app = OIDC::Lite::Server::Endpoint::Registration->new(
        data_handler => 'MyDataHandlerClass',
    );
    $app->support_types(qw(client_register client_update rotate_secret));
    $app;
};

DESCRIPTION

The object of this class behaves as PSGI application (subroutine reference). This is for OpenID Connect registration-endpoint.

Reference spec: http://openid.net/specs/openid-connect-registration-1_0-14.html

At first you have to make your custom class inheriting OIDC::Lite::Server::DataHandler, and setup PSGI file with it.

METHODS

new( %params )

data_handler

name of your custom class that inherits OIDC::Lite::Server::DataHandler and implements interface.

error_uri

Optional. URI that represents error description page. This would be included in error responses.

support_grant_type( $type )

support_grant_types( @types )

You can set 'client_register', 'rotate_secret', or 'client_update'

data_handler

psgi_app

compile_psgi_app

handle_request( $req )

TEST

You can test with OAuth::Lite2::Agent::PSGIMock and some of client classes.

my $app = OIDC::Lite::Server::Endpoint::Registration->new(
    data_handler => 'MyDataHandlerClass',
);

my $mock_agent = OAuth::Lite2::Agent::PSGIMock->new(app => $app);
my $client = OAuth::Lite2::Client::Registration->new(
    registration_endpoint   => q{http://localhost/redirect}
    agent   => $mock_agent,
);

my $config = {
    redirect_uris => q{https://example.com/redirect_uri},
    application_name => q{test_app_name},
};

my $client_credentials = $client->associate(
    metadata => $config,
);
ok($client_credentials);

AUTHOR

Ryo Ito, <ritou.06@gmail.com>

COPYRIGHT AND LICENSE

Copyright (C) 2012 by Ryo Ito

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.8 or, at your option, any later version of Perl 5 you may have available.