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Oct 28, 2024
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Add CVE-2024-49761: ReDoS vulnerability in REXML #3400

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Add CVE-2024-49761: ReDoS vulnerability in REXML
kou Oct 28, 2024
58efc2e
Fix a typo
kou Oct 28, 2024
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31 changes: 31 additions & 0 deletions en/news/_posts/2024-10-28-redos-rexml-cve-2024-49761.md
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---
layout: news_post
title: "CVE-2024-49761: ReDoS vulnerability in REXML"
author: "kou"
translator:
date: 2024-10-28 03:00:00 +0000
tags: security
lang: en
---

There is a ReDoS vulnerability in REXML gem. This vulnerability has been assigned the CVE identifier [CVE-2024-49761](https://www.cve.org/CVERecord?id=CVE-2024-49761). We strongly recommend upgrading the REXML gem.

This does not happen with Ruby 3.2 or later. Ruby 3.1 is the only affected maintained Ruby. Note that Ruby 3.1 will reach EOL on 2025-03.

## Details

When parsing an XML that has many digits between `&#` and `x...;` in a hex numeric character reference (`&#x...;`).

Please update REXML gem to version 3.3.9 or later.

## Affected versions

* REXML gem 3.3.8 or prior with Ruby 3.1 or prior

## Credits

Thanks to [manun](https://hackerone.com/manun) for discovering this issue.

## History

* Originally published at 2024-10-28 03:00:00 (UTC)