Security Advisories (1)
CVE-2026-2439 (2026-02-16)

Concierge::Sessions versions from 0.8.1 before 0.8.5 for Perl generate insecure session ids. The generate_session_id function in Concierge::Sessions::Base defaults to using the uuidgen command to generate a UUID, with a fallback to using Perl's built-in rand function. Neither of these methods are secure, and attackers are able to guess session_ids that can grant them access to systems. Specifically, * There is no warning when uuidgen fails. The software can be quietly using the fallback rand() function with no warnings if the command fails for any reason. * The uuidgen command will generate a time-based UUID if the system does not have a high-quality random number source, because the call does not explicitly specify the --random option. Note that the system time is shared in HTTP responses. * UUIDs are identifiers whose mere possession grants access, as per RFC 9562. * The output of the built-in rand() function is predictable and unsuitable for security applications.

Changes for version v0.8.4 - 2026-02-12

  • Fixed integration test timing margins for slow platforms (Windows/Strawberry Perl)

Documentation

Modules

Session manager with factory pattern and multiple backend support
Base class for session storage backends
File backend for session storage
SQLite backend for session storage
Individual session objects for data access and persistence