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Add CVE-2025-58767: DoS vulnerability in REXML #3617

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Sep 17, 2025
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Add CVE-2025-58767: DoS vulnerability in REXML #3617

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28 changes: 28 additions & 0 deletions en/news/_posts/2025-09-18-dos-rexml-cve-2025-58767.md
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---
layout: news_post
title: "CVE-2025-58767: DoS vulnerability in REXML"
author: "naitoh"
translator:
date: 2025-09-18 03:00:00 +0000
tags: security
lang: en
---

There is a DoS vulnerability in REXML gem. This vulnerability has been assigned the CVE identifier [CVE-2025-58767](https://www.cve.org/CVERecord?id=CVE-2025-58767). We strongly recommend upgrading the REXML gem.

## Details

Parsing invalid XML containing multiple XML declarations may cause increased execution time and memory usage.
Please update REXML gem to version 3.4.2 or later.

## Affected versions

* REXML gem from 3.3.3 to 3.4.1

## Credits

Thanks to [Sofi Aberegg](https://github.com/sofiaaberegg) for discovering this issue.

## History

* Originally published at 2025-09-18 03:00:00 (UTC)
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