Critical Security Flaw in Ruby Package: ERB Arbitrary Code Execution Vulnerability
Summary
RLSA-2026:18065: Important: ruby security update. Affects ruby versions < 0:3.3.10-12.el10_1. Fixed in 0:3.3.10-12.el10_1. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
Background
Ruby is a dynamic, interpreted, object-oriented scripting language known for its simplicity and productivity. It is widely used for web development, particularly with the Ruby on Rails framework. The language includes features for text processing and system management, making it versatile for various applications. However, a recent security vulnerability has been identified in the ERB (Embedded Ruby) component, which could allow for arbitrary code execution through a deserialization bypass.
Vulnerability Detail
The vulnerability, identified as CVE-2026-41316, arises from a flaw in the ERB component of Ruby, which can be exploited to execute arbitrary code. This issue occurs due to improper handling of deserialization, allowing attackers to craft malicious input that can bypass security checks. The potential ramifications include unauthorized access to sensitive data, system compromise, and the ability to execute arbitrary commands on the server running the affected Ruby application. The CVSS score for this vulnerability is 8.1, indicating a high severity level.
How To Fix
Minimum fixed version
0:3.3.10-12.el10_1
This is the first release that contains the fix.
sudo dnf update rubyTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate patching is not feasible, consider implementing input validation to sanitize user inputs and prevent malicious data from being processed by the ERB component. This can help reduce the risk of exploitation until the package can be updated.
Conclusion
The identified vulnerability in the Ruby package's ERB component poses a significant risk to applications utilizing this language. It is crucial for developers and system administrators to apply the necessary updates to protect their systems from potential exploitation. Regular monitoring and vulnerability management practices, such as those offered by Vulert, can further enhance security.
See every vulnerability recorded for ruby →
FAQ
CVE-2026-41316 is a security vulnerability in the Ruby programming language's ERB component that allows for arbitrary code execution via deserialization bypass.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Exploitation of this vulnerability can lead to unauthorized access, data breaches, and the execution of arbitrary commands on the server.
Run the command 'sudo yum update ruby' in your terminal to update to the patched version of Ruby.
The CVSS score for this vulnerability is 8.1, indicating a high severity level.
Related vulnerabilities
Recent vulnerabilities recorded for ruby.
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
