---
id: CVE-2025-10990
title: A flaw was found in REXML
summary: >-
  A flaw was found in REXML. A remote attacker could exploit inefficient regular
  expression (regex) parsing when processing hex numeric character references
  (&#x...;) in XML documents. This could lead to a Regular Expression Denial of
  Serv…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-1333
published: '2026-02-27'
updated: '2026-06-26'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-10990'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2025:17606'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:17613'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2025:17693'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2025-10990'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2398216'
    label: secalert@redhat.com
  - url: >-
      https://github.com/ruby/rexml/commit/ce59f2eb1aeb371fe1643414f06618dbe031979f
    label: secalert@redhat.com
  - url: 'https://github.com/ruby/rexml/security/advisories/GHSA-2rxp-v6pw-ch6m'
    label: secalert@redhat.com
  - url: 'https://www.ruby-lang.org/en/news/2024/10/28/redos-rexml-cve-2024-49761/'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00468
epssPercentile: 0.37929
ingestedAt: '2026-06-26T16:43:13.616Z'
---

## Overview

A flaw was found in REXML. A remote attacker could exploit inefficient regular expression (regex) parsing when processing hex numeric character references (&#x...;) in XML documents. This could lead to a Regular Expression Denial of Service (ReDoS), impacting the availability of the affected component. This issue is the result of an incomplete fix for CVE-2024-49761.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.