CVE-2026-13577

*** Pendiente de traducción *** Dancer2 versions through 2.1.0 for Perl generate insecure session ids when CSPRNG modules are unavailable.<br /> <br /> 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.<br /> <br /> 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).<br /> <br /> These are all low-entropy and easily guessed sources.<br /> <br /> The built-in rand() function is seeded with 32-bits and considered unsuitable for security applications.<br /> <br /> Predictable session ids could allow an attacker to gain access to systems.