Ruby: Remote code execution (GLSA 202609-03)

Security.Gentoo • September 13, 2026

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A vulnerability has been discovered in Ruby, possibly allowing remote code execution.

Ruby is an interpreted scripting language for quick and easy object-oriented programming.

A vulnerability has been discovered in Ruby. Please review the CVE identifier referenced below for details.

Remote code execution is possible.

There is no known workaround at this time.

All Ruby 3.3 users should upgrade to the latest version:

All Ruby 3.4 users should upgrade to the latest version:

All Ruby 4.0 users should upgrade to the latest version:

All ERB users should upgrade to the latest version:

Release date September 12, 2026

Latest revision September 12, 2026: 1

The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Critical Ruby Vulnerability Enables Remote Code Execution A high-severity vulnerability (CVE-2026-41316) has been identified in Ruby, potentially allowing remote code execution. This affects all users of Ruby versions 3.3, 3.4, and 4.0, as well as ERB users. The vulnerability was published on April 24, 2026, and a patch was released on September 12, 2026. No known workarounds are available at this time, making immediate updates essential for affected systems. The vulnerability has raised significant concerns due to its potential impact on a wide range of applications that utilize Ruby. Security advisories have been issued, urging users to upgrade to the latest versions to mitigate risks. 4 sources 74

Extracted Entities

Attack Types (1)

Remote Code Execution

Platforms (2)

Vulnerabilities (1)