CVE-2026-66066-POC

PoC for CVE-2026-66066 - Minimal stock Rails/libvips lab This repository reproduces the Rails Active Storage file-read-to-RCE chain described by GHSA-xr9x-r78c-5hrm against Rails 8.1.3, the newest affected Rails 8.1 release. Rails 8.1.3.1 is the patched control. Use it only in the disposable loca...

KindaRails2Shell

KindaRails2Shell: CVE-2026-66066 A zero-dependency, single-file proof of concept and loopback-only Docker lab for the Rails Active Storage/libvips arbitrary-file-read vulnerability. It also demonstrates the advisory's conditional escalation from a recovered secretkeybase to a forged image variati...

rails-forensics-CVE-2026-66066

rails-forensics-CVE-2026-66066 Tooling and method for answering two questions about a Rails application and CVE-2026-66066, the Active Storage and libvips arbitrary file read known as KindaRails2Shell: 1. Was I vulnerable, and for how long? 2. Was I exploited, and if so, what left the building? T...

CVE-2026-66066

CVE-2026-66066 — KindaRails2Shell Ruby on Rails Active Storage + libvips arbitrary file read → conditional remote code execution RCE PoC tool. Single-file, Python 3.11+ pure standard library with zero dependencies , includes MAT/HDF5 hybrid payloads, a pure-Python PNG pixel decoder, offset reads,...

Astra Linux – Vulnerability in Rails

Active Storage allows users to attach cloud and local files in Rails applications. Before versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Storage’s DiskServicepathfor method did not validate that the resolved filesystem path remained within the storage root directory. If a blob key containing path...

Astra Linux – Vulnerability in Rails

Active Storage allows users to attach cloud and local files in Rails applications. Before versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Storage’s DiskServicedeleteprefixed method passed blob keys directly to Dir.glob, without escaping the glob metacharacters. If a blob key contains...

...[ More ]

This Metasploit module exploits CVE-2026-66066 in Ruby on Rails Active Storage when the application uses the Vips variant processor and accepts untrusted image uploads. A crafted MATLAB v7.3/HDF5 image uses external storage to read text files accessible to the Rails worker through a PNG...

CVE-2026-66066-POC — Updated!

PoC for CVE-2026-66066 - Minimal stock Rails/libvips lab This repository reproduces the Rails Active Storage file-read-to-RCE chain described by GHSA-xr9x-r78c-5hrm against Rails 8.1.3, the newest affected Rails 8.1 release. Rails 8.1.3.1 is the patched control. Use it only in the disposable loca...

Exploit for CVE-2026-66066

CVE-2026-66066 — KindaRails2Shell Rails Active Storage/libvips A...

Exploit for CVE-2026-66066

kindarails2shell-poc CVE-202...

The vulnerability affects the libvips image processing library in the Active Storage component of the Ruby on Rails software framework. This allows attackers to execute arbitrary code and gain unauthorized access to protected information.

The vulnerability of the libvips image processing library, a component of the Active Storage framework in the Ruby on Rails software platform, relates to insecure resource initialization. Exploiting this vulnerability could allow an attacker to execute arbitrary code remotely and gain unauthorize...

Rails Active Storage Has A Possible DoS Vulnerability In Proxy Mode Via Multi-range Requests

Impact Active Storage's proxy controller does not limit the number of byte ranges in an HTTP Range header. A request with thousands of small ranges causes disproportionate CPU usage compared to a normal request for the same file, possibly resulting in a DoS vulnerability. Releases The fixed...

Linux Distros Unpatched Vulnerability : CVE-2026-33658

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 Active Storage's proxy...

CVE-2026-33658

Ruby on Rails Active Storage is affected by a DoS vulnerability in the proxy mode where the HTTP Range header can include thousands of small ranges, causing disproportionate CPU usage. This impacts Rails applications using Active Storage prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1. A patch ha...

CVE-2026-33658 Rails Active Storage has a possible DoS vulnerability in proxy mode via multi-range requests

Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 Active Storage's proxy controller does not limit the number of byte ranges in an HTTP Range header. A request with thousands of small ranges causes disproportionate C...

Rails Active Storage has a possible DoS vulnerability in proxy mode via multi-range requests

Impact Active Storage's proxy controller does not limit the number of byte ranges in an HTTP Range header. A request with thousands of small ranges causes disproportionate CPU usage compared to a normal request for the same file, possibly resulting in a DoS vulnerability. Releases The fixed...

GHSA-P9FM-F462-GGRG Rails Active Storage has a possible DoS vulnerability in proxy mode via multi-range requests

Impact Active Storage's proxy controller does not limit the number of byte ranges in an HTTP Range header. A request with thousands of small ranges causes disproportionate CPU usage compared to a normal request for the same file, possibly resulting in a DoS vulnerability. Releases The fixed...

Linux Distros Unpatched Vulnerability : CVE-2026-33202

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Storage's...

Linux Distros Unpatched Vulnerability : CVE-2026-33174

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, when serving files through...

CVE-2026-33173

A flaw was found in Rails Active Storage. A remote attacker, acting as a direct-upload client, can exploit this vulnerability by manipulating metadata during file uploads. By setting internal flags, the attacker can bypass the system's automatic MIME Multipurpose Internet Mail Extensions type...