# CVE-2006-4112: Rails Denial of Service vulnerability

> Remote attackers can execute arbitrary Ruby code or cause denial of service via malicious URLs in the routing mechanism of Ruby on Rails.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 14 Aug 2006
- **Updated:** 7 Aug 2024
- **Also known as:** DEBIAN-CVE-2006-4112, GHSA-9wrq-xvmp-xjc8

## What is CVE-2006-4112?

CVE-2006-4112 is a high-severity code injection vulnerability in Rubyonrails Rails, published on 14 Aug 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Unspecified vulnerability in the "dependency resolution mechanism" in Ruby on Rails 1.1.0 through 1.1.5 allows remote attackers to execute arbitrary Ruby code via a URL that is not properly handled in the routing code, which leads to a denial of service (application hang) or "data loss," a different vulnerability than CVE-2006-4111.

## Which versions are affected by CVE-2006-4112?

2 open source packages ship an affected version, including rails. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `rails` | RubyGems | From 1.1.0 | 1.1.6 |
| `rails` | RubyGems | From 1.1.0 | 1.1.6 |

Products: Rubyonrails Rails.

## How do I fix CVE-2006-4112?

Upgrade rails to 1.1.6 or later.

## Is CVE-2006-4112 being exploited?

There is no known exploitation of CVE-2006-4112 in the wild and no public exploit code.

## Other vulnerabilities in Rubyonrails Rails

- [CVE-2013-0277](https://insights.sbomify.com/CVE-2013-0277/): Active Record contains deserialization of arbitrary YAML (critical 10.0)
- [CVE-2017-17916](https://insights.sbomify.com/CVE-2017-17916/): SQL injection in n/a (high 8.1)
- [CVE-2017-17917](https://insights.sbomify.com/CVE-2017-17917/): SQL injection in n/a (high 8.1)
- [CVE-2026-33195](https://insights.sbomify.com/CVE-2026-33195/): Rails Active Storage has possible Path Traversal in DiskService (high 8.0)
- [CVE-2024-26142](https://insights.sbomify.com/CVE-2024-26142/): Rails possible ReDoS vulnerability in Accept header parsing in Action Dispatch (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-4112 and fix it if it is affected.

What it is: CVE-2006-4112 is a high-severity code injection vulnerability in Rubyonrails Rails, published on 14 Aug 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2006-4112 in the wild and no public exploit code.

Affected packages and fixed versions:
- rails (RubyGems): affected from 1.1.0; fixed in 1.1.6
- rails (RubyGems): affected from 1.1.0; fixed in 1.1.6

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2006-4112/ (Markdown: https://insights.sbomify.com/CVE-2006-4112/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-4112
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-4112
- OSV: https://osv.dev/vulnerability/CVE-2006-4112

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-4112/
Summaries are generated and may contain mistakes; the official description above is the record.