---
id: CVE-2026-92987
title: >-
  roxmltree through 0.21.1 performs quadratic-time attribute and namespace
  validation during XML parsing without limits on attribute count
summary: >-
  roxmltree through 0.21.1 performs quadratic-time attribute and namespace
  validation during XML parsing without limits on attribute count. Attackers can
  craft XML documents with tens of thousands of attributes on a single element
  to consu…
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-407
  - CWE-1050
vendor: RazrFalcon
product: roxmltree
affected:
  - roxmltree <= 0.21.1
published: '2026-09-17'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T20:43:58.793'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92987'
references:
  - url: 'https://github.com/RazrFalcon/roxmltree'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/RazrFalcon/roxmltree/blob/v0.21.1/src/lib.rs#L751-L755'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/RazrFalcon/roxmltree/blob/v0.21.1/src/parse.rs#L1014-L1020
    label: disclosure@vulncheck.com
  - url: 'https://github.com/RazrFalcon/roxmltree/issues/153'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/roxmltree-through-0.21.1-denial-of-service-via-quadratic-parsing
    label: disclosure@vulncheck.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92987.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-92987'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2536068'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-92987'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92987'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00353
epssPercentile: 0.29061
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-17T15:32:00.518891Z'
ingestedAt: '2026-09-17T15:20:39.003Z'
---

## Overview

roxmltree through 0.21.1 performs quadratic-time attribute and namespace validation during XML parsing without limits on attribute count. Attackers can craft XML documents with tens of thousands of attributes on a single element to consume excessive CPU time and cause denial of service.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Important · affected: Confidential Compute Attestation, Logging Subsystem for Red Hat OpenShift, Red Hat Enterprise Linux 10, Red Hat Trusted Artifact Signer, Red Hat Trusted Profile Analyzer · no fix planned: Red Hat Trusted Profile Analyzer, Confidential Compute Attestation, Logging Subsystem for Red Hat OpenShift, Red Hat Enterprise Linux 10, … · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92987.json)