GitHub has released security updates for Enterprise Server (GHES) to address multiple issues, including a critical bug that could allow unauthorized access to an instance. The vulnerability, tracked as CVE-2024-9487, carries a CVS score of 9.5 out of a maximum of 10.0. An attacker could bypass SAML single sign-on (SSO) authentication with the optional encrypted assertions feature, allowing unauthorized provisioning of users and access to the instance, by exploiting an improper verification of cryptographic signatures vulnerability in GitHub Enterprise Server