CVE-2026-44990

Description

Apostrophe has default XSS via `xmp` raw-text passthrough in `sanitize-html`

Description (MITRE) cveawg.mitre.org

Pulled from cveawg.mitre.org/api/cve/CVE-2026-44990 on 2026-07-27. Shown when MITRE's text differs from the cvelistV5 mirror.

ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Under the default configuration, versions of `sanitize-html` prior to 2.17.4 can turn attacker-controlled content inside a disallowed `xmp` element into live HTML or JavaScript. This is a sanitizer bypass in the default `disallowedTagsMode: 'discard'` path and can lead to stored XSS in applications that render sanitized output back to users. Version 2.17.4 patches the issue.

Overview

State

—

Assigner (CNA)

—

CVSS severity

critical

CVSS score

9.3 / 10

CVSS vector

AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Effective score

9.3 / 10 CRITICAL source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2026-44990

Linked Threat

CVE-2026-44990 — CVE-2026-44990

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-36566

Assigner

GitHub_M

Published

Jun 12, 2026, 8:39:47 PM

Updated

Aug 13, 2026, 12:04:30 PM

EUVD base score (CVSS 3.1)

9.3 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

EUVD-reported EPSS

0.5100

Vendors

apostrophecms

Products

sanitize-html (< 2.17.4)

Aliases

GHSA-rpr9-rxv7-x643

ENISA description: ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Under the default configuration, versions of `sanitize-html` prior to 2.17.4 can turn attacker-controlled content inside a disallowed `xmp` element into live HTML or JavaScript. This is a sanitizer bypass in the default `disallowedTagsMode: 'discard'` path and can lead to stored XSS in applications that render sanitized output back to users. Version 2.17.4 patches the issue.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

MITRE references (1) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

• https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-rpr9-rxv7-x643 x_refsource_CONFIRM

Web references (2)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://nvd.nist.gov/vuln/detail/CVE-2026-44990 tenable:nvd.nist.gov
• https://www.cve.org/CVERecord?id=CVE-2026-44990 tenable:www.cve.org

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

• Oracle Critical Patch Update, April 2026 Security Update Review
  web:blog.qualys.com

  Oracle released its second quarterly edition of this year's Critical Patch Update. The update received patches for 481 security vulnerabilities.

  2026-05-26 02:55 UTC
• April 2026 Critical Patch Update Released | security - Oracle Blogs
  web:blogs.oracle.com

  For more information about the Critical Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.

  2026-05-26 02:55 UTC
• April 2026 Patch Tuesday | Critical Patches & Deployment Guide
  web:layerlogix.com

  April 2026 Patch Tuesday drops today. Here's what's critical, what to patch first, and how Houston IT teams should handle deployment — including the Secure Boot certificate deadline reminder.

  2026-05-26 02:55 UTC
• Security Update Guide - Microsoft
  web:msrc.microsoft.com

  The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

  2026-05-26 02:55 UTC
• Microsoft Issues Second Biggest Patch Tuesday Ever in April
  web:redmondmag.com

  Microsoft April 2026 Patch Tuesday fixed 163 CVEs , marking its second-largest security update. Three zero-day vulnerabilities impacted SharePoint, Chromium-based Edge workflows and Microsoft Defender.

  2026-05-26 02:55 UTC
• CVE-2026-44990: Critical XSS Vulnerability in sanitize-html Package
  web:vulert.com

  Learn about CVE-2026-44990 , a critical XSS vulnerability in the sanitize-html package, its impact, and how to fix it.

  2026-05-26 02:55 UTC
• April 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
  web:www.crowdstrike.com

  Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.

  2026-05-26 02:55 UTC
• April 2026 Patch Tuesday | Ivanti
  web:www.ivanti.com

  April Patch Tuesday is the second-largest Patch Tuesday on record behind the October 2025 Patch Tuesday which resolved 175 CVEs . The lineup includes one zero-day exploit ( CVE - 2026 -3220) and one public disclosure ( CVE - 2026 -33825) and breaks down into 8 Critical, 156 Important, 3 Moderate and 1 Low severity.

  2026-05-26 02:55 UTC
• Oracle Patches 450 Vulnerabilities With April 2026 CPU
  web:www.securityweek.com

  Oracle on Tuesday announced the release of 481 new security patches as part of its April 2026 Critical Patch Update (CPU). Across the 28 product families that received security updates, more than 300 patches address vulnerabilities that are remotely exploitable without authentication.

  2026-05-26 02:55 UTC
• Windows 11 April 2026 Update tested: What's new, improved and fixed
  web:www.windowslatest.com

  Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.

  2026-05-26 02:55 UTC

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