CVE-2026-66066

CVE-2026-66066

A flaw was found in Active Storage, a component of Action Pack. An unauthenticated attacker can exploit this vulnerability by crafting a malicious file upload. This allows the attacker to invoke unsafe `libvips` operations, leading to the ability to read arbitrary files on the system including sensitive environment variables and application secrets. The exposure of these credentials could enable remote code execution or lateral movement within the affected system.

CVE-2026-66066

Action Pack is a framework for handling and responding to web requests. In versions prior to 7.2.3.2, 8.0.5.1 and 8.1.3.1, Active Storage does not disable libvips operations marked unsafe for untrusted content, allowing a crafted upload to invoke such an operation. Consuming applications are affected when configured to use libvips and accept image uploads from untrusted users. An unauthenticated attacker may exploit this behavior to read arbitrary files accessible to the Rails process, including environment variables and application secrets. Exposure of credentials such as secret_key_base or external-service tokens may enable remote code execution or lateral movement. This issue has been fixed in versions 7.2.3.2, 8.0.5.1 and 8.1.3.1.

CVE-2026-66066

Action Pack is a framework for handling and responding to web requests ...

GHSA-xr9x-r78c-5hrm

Active Storage has possible arbitrary file read and remote code execution in Active Storage variant processing

BDU:2026-10713

Уязвимость системной библиотеки обработки изображений libvips компонента Active Storage программной платформы Ruby on Rails, позволяющая нарушителю выполнить произвольный код и получить несанкционированный доступ к защищаемой информации