/ 
Plack-1.0055
⭐ Starred 488 / Plack::Middleware::SimpleLogger
Security Advisories (1)
CVE-2026-115825 (2026-10-25)

HTTP::Server::PSGI versions before 1.0056 for Perl allow a single request to crash the server by declaring a large Content-Length. The request body is read with sysread() calls sized by the remaining Content-Length. Perl grows the read buffer to the requested length before any data arrives, so the server tries to allocate as much memory as the client declares. A remote attacker can send one request with a large Content-Length and a few body bytes, and perl exits with an out-of-memory error before the application is called. HTTP::Server::PSGI runs as a single process, so the server stays down until restarted.

NAME

Plack::Middleware::SimpleLogger - Simple logger that prints to psgi.errors

SYNOPSIS

enable "SimpleLogger", level => "warn";

DESCRIPTION

SimpleLogger is a middleware component that formats the log message with information such as the time and PID and prints them to psgi.errors stream, which is mostly STDERR or server log output.

SEE ALSO

Plack::Middleware::LogErrors, essentially the opposite of this module

AUTHOR

Tatsuhiko Miyagawa