CVE-2019-5420

CVE-2019-5420 CVE-2019-5420 Ruby on Rails For educational purposes only. See Reference for the details. Environment Ruby: 2.6.0p0 Rails: 5.2.2 Run $ docker run --name cve-2019-5420 --rm -p 3000:3000 knqyf263/cve-2019-5420 Exploit Execute touch /tmp/rce $ curl...

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,...

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...

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...

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 Rails Active Storage/libvips Arbitrary File Read → SECRETKEYBASE Theft → RCE Overview CVE-2026-66066 is a critical-severity CVSS 9.5 pre-authentication arbitrary file read to remote code execution chain in Ruby on Rails Active Storage, affecting Rails 7.2.0–7.2.3...

CVE-2026-66066

🚨 CVE-2026-66066 — KindaRails2Shell Pre-Authentication Remote Code Execution RCE in Ruby on Rails Active Storage Educational security research repository for CVE-2026-66066 "KindaRails2Shell". This repository is intended for security research, vulnerability analysis, detection, and defensive...

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. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, when serving files through Active Storage’s proxy delivery mode, the proxy controller would load the entire requested byte range into memory before sending it. A...

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...

Astra Linux – Vulnerability in Rails

There is a code injection vulnerability in Active Storage version 5.2.0 and later, which could allow an attacker to execute code through imageprocessing arguments...

Attackers Exploit Critical Langflow and Rails Flaws in Credential-Probing and C2 Activity

Threat actors are exploiting two critical flaws impacting Langflow and Ruby on Rails, according to new findings from VulnCheck. The vulnerabilities in question are listed below - CVE-2026-0768 CVSS score: 9.8 - A lack of proper validation of a user-supplied input vulnerability that could be...

VulnCheck KEV: 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...

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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...

Basecamp: One-click cross-account JavaScript execution steals a victim write token through Turbo pagination and unattached Active Storage HTML

A cross-account JavaScript execution vulnerability was discovered in a web application that allowed arbitrary code execution when a victim opened a crafted public board URL. An attacker with a separate account could leverage this vulnerability to steal the victim's write access token through a...

CVE-2026-45378

Decidim is a participatory democracy framework. Prior to 0.30.9, from 0.31.0 before 0.31.5, and in 0.32.0.rc1 before 0.32.0.rc2, the identity-document verification admin UI embeds verificationattachment blobs through reusable signed Active Storage disk URLs, allowing anyone who obtains a URL to...

CVE-2026-45378

CVE-2026-45378 affects Decidim where the identity-document verification admin UI embeds verification_attachment blobs using reusable signed Active Storage disk URLs. The implementation renders images with variant_url(...), producing signed /rails/active_storage/disk/... links that bypass authoriz...

CVE-2026-45378 Decidim: Verification documents can be downloaded through reusable links

Decidim is a participatory democracy framework. Prior to 0.30.9, from 0.31.0 before 0.31.5, and in 0.32.0.rc1 before 0.32.0.rc2, the identity-document verification admin UI embeds verificationattachment blobs through reusable signed Active Storage disk URLs, allowing anyone who obtains a URL to...

CVE-2026-45378 Decidim: Verification documents can be downloaded through reusable links

Decidim is a participatory democracy framework. Prior to 0.30.9, from 0.31.0 before 0.31.5, and in 0.32.0.rc1 before 0.32.0.rc2, the identity-document verification admin UI embeds verificationattachment blobs through reusable signed Active Storage disk URLs, allowing anyone who obtains a URL to...

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...