/ 
OIDC-Lite-0.01
/ OIDC::Lite::Server::Scope
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::Scope - utility class for OpenID Connect Scope

SYNOPSIS

use OIDC::Lite::Server::Scope;

my @scopes = ...

# if request doesn't inclue 'openid' and include other OIDC scope, return false
if(OIDC::Lite::Server::Scope->validate_scopes(\@scopes)){
    # valid scopes
}else{
    # invalid scopes
}    

# return OpenID Connect request or not
if(OIDC::Lite::Server::Scope->is_openid_request(\@scopes)){
    # OpenID Connect Request
    # issue ID Token
}else{
    # OAuth 2.0 Request
    # don't issue ID Token
}

# returned normal claims for scopes
my $claims = OIDC::Lite::Server::Scope->to_normal_claims(\@scopes);

DESCRIPTION

This is utility class for OpenID Connect scope.

METHODS

validate_scopes( $scopes )

If request doesn't inclue 'openid' and include other OIDC scope, return false. 'openid' : true 'not_openid' : true 'openid profile' : true 'profile' : false 'not_openid profile' : false

is_openid_request( $scopes )

Returns the requested scope is for OpenID Connect or not.

is_required_offline_access( $scopes )

Returns the requested scope includes 'offline_access' or not.

to_normal_claims( $req )

Returns normal claims for requested scopes.

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.