Security Advisories (2)
CVE-2026-15747 (2026-07-14)

Mojolicious versions from 4.59 before 9.48 for Perl expose a stable representation of the session CSRF token to a BREACH compression oracle. _csrf_token generates and caches one token per session and returns the same value on every call, and _csrf_field places that value in a hidden `csrf_token` input. When a response carrying the token also echoes attacker-controlled input and is gzip-compressed, the chosen values and the resulting compressed lengths form a BREACH oracle. An attacker able to query it can recover the token and pass csrf_protect validation.

CVE-2024-58134 (2025-05-03)

Mojolicious versions from 0.999922 for Perl uses a hard coded string, or the application's class name, as an HMAC session cookie secret by default. These predictable default secrets can be exploited by an attacker to forge session cookies.  An attacker who knows or guesses the secret could compute valid HMAC signatures for the session cookie, allowing them to tamper with or hijack another user’s session.

NAME

Mojo::Cookie - HTTP cookie base class

SYNOPSIS

package Mojo::Cookie::MyCookie;
use Mojo::Base 'Mojo::Cookie';

sub parse     {...}
sub to_string {...}

DESCRIPTION

Mojo::Cookie is an abstract base class for HTTP cookie containers, based on RFC 6265, like Mojo::Cookie::Request and Mojo::Cookie::Response.

ATTRIBUTES

Mojo::Cookie implements the following attributes.

name

my $name = $cookie->name;
$cookie  = $cookie->name('foo');

Cookie name.

value

my $value = $cookie->value;
$cookie   = $cookie->value('/test');

Cookie value.

METHODS

Mojo::Cookie inherits all methods from Mojo::Base and implements the following new ones.

parse

my $cookies = $cookie->parse($str);

Parse cookies. Meant to be overloaded in a subclass.

to_string

my $str = $cookie->to_string;

Render cookie. Meant to be overloaded in a subclass.

OPERATORS

Mojo::Cookie overloads the following operators.

bool

my $bool = !!$cookie;

Always true.

stringify

my $str = "$cookie";

Alias for "to_string".

SEE ALSO

Mojolicious, Mojolicious::Guides, https://mojolicious.org.