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Punk-0.04
Security Advisories (1)
CVE-2026-75870 (2026-08-22)

Punk versions before 0.18 for Perl allow session cookie forgery via an empty default HMAC key when a session is declared without a secret. The session keyword freezes its options onto the application as given: it does not require a secret, warn, or refuse to start when one is absent. The cookie read and the write-back both default that key to the empty string, so a declaration with no secret option, or with an undefined or empty one, signs and verifies with a zero-length HMAC-SHA256 key. An attacker who knows the cookie format can then mint one offline carrying any contents the session holds, such as a user identifier or a role. Nothing marks the misconfiguration at runtime: cookies are well formed and sessions round-trip as expected.

Changes for version 0.04 - 2026-08-08

  • Fixed the configure-time dependency declaration, which is why 0.03 could not be installed from CPAN at all.
  • $app->install_kw($name => $code, $owner?): a plugin can install a declaration keyword of its own into the application class instead of assigning to a glob there.
  • params now takes names: `$c->params(@names)` and `$req->params(@names)` return just those, as a list of values in the order asked for, or - in scalar context - a hashref of only the names that were passed.

Modules

Punk
a MVC web framework
Punk::App
the per-application registry and boot compiler
Punk::CORS
cross-origin resource sharing
Punk::CSRF
single-use CSRF tokens
Punk::Command
the subcommands behind the punk tool
Punk::Config
YAML configuration with secrets kept out of the file
Punk::Context
the per-request object
Punk::Controller
base class for Punk controllers
Punk::Future
an async result that runs on the loop, or blocks
Punk::Generate
scaffold a new Punk application
Punk::Logger
a level-based logger
Punk::Model
the storage-agnostic model tier
Punk::Model::DBI
the default DBI backend for Punk models
Punk::Model::DBIx::Loop
a non-blocking backend for Punk models
Punk::Mount::Markdown
a directory of markdown as a documentation site
Punk::Mount::OpenAPI
the api mount: spec-first operations
Punk::Plugin
base class for Punk plugins
Punk::Request
a lazy wrapper over the PSGI environment
Punk::Response
a response builder
Punk::Router
the compiled-at-boot route tables (XS)
Punk::Router::Scope
the handle an under returns
Punk::SSE
a Server-Sent Events stream
Punk::Session
signed cookie sessions
Punk::Static
serving files from a directory
Punk::UA
the outbound HTTP agent on the context
Punk::Upload
an uploaded file from a multipart form
Punk::View::Stencil
the Template::Stencil view engine
Punk::Views
the pluggable view engine registry (XS)
Punk::WebSocket
a WebSocket connection
Punk::WebSocket::Room
pub/sub groups of WebSocket connections

Examples

Other files