
CVE-2026-42155 — Cryptographic Entropy Collapse in OpenMage LTS API Session Generation
Hello, Today we will walkthrough another CVE (CVE-2026-42155) that I discovered in OpenMage LTS, a popular open-source e-commerce platform (yes using AI). This vulnerability is a cryptographic entropy collapse in the API session generation mechanism, which can lead to predictable session tokens and potential unauthorized access. In summary, the vulnerability arises from a 17 years old code snippet that was used to generate session tokens for API requests using a non-cryptographic method. The session tokens are generated using a combination of the current time and a unique identifier, which can be predicted by an attacker. This allows an attacker to potentially guess valid session tokens and gain unauthorized access to the API. ...