Sentry is an error tracking and performance monitoring platform. In versions of the sentry python library prior to 22.11.0 an attacker with a known valid invite link could manipulate a cookie to allow the same invite link to be reused on multiple accounts when joining an organization. As a result an attacker with a valid invite link can create multiple users and join an organization they may not have been originally invited to. This issue was patched in version 22.11.0. Sentry SaaS customers do not need to take action. Self-hosted Sentry installs on systems which can not upgrade can disable the invite functionality until they are ready to deploy the patched version by editing their sentry.conf.py file (usually located at ~/.sentry/).