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Critical· 9.3official fix available

CVE-2026-44990

A vulnerability in the sanitize-html library used by ApostropheCMS allows attackers to inject malicious HTML or JavaScript into content that is supposed to be sanitized. The flaw exists in versions before 2.17.4 and can lead to stored cross‑site scripting (XSS) attacks.

publishedJun 12, 2026
last modifiedAug 3, 2026
sourcesNVD
severity · cvss
9.3
critical · how bad it is
exploitation · epss
<1%
41th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Aug 18, 2026

An official fix is available, so this entry is kept for 30 days and then removed automatically.

01

Who is affected

Developers and site owners using ApostropheCMS or any Node.js application that relies on sanitize-html versions earlier than 2.17.4.

02

Real-world impact

An attacker can embed harmful scripts that run in the browsers of anyone who views the affected content, potentially stealing credentials, hijacking sessions, or defacing the site.

03

Why this severity

The CVSS score of 9.3 reflects that the flaw can be exploited over the network with no special privileges, requires user interaction, and can compromise both confidentiality and integrity of data displayed to users.

04

What to do about it

official fix available
recommended steps
  1. 01Update the project’s package.json to depend on sanitize-html version 2.17.4 or later.
  2. 02Run `npm install` (or the appropriate package manager command) to install the updated library.
  3. 03Verify that the application is now using the patched version by checking the installed package version or running a dependency audit.
  4. 04Restart the web server or application process to ensure the new library is loaded.

NVD-referenced vendor advisory

05

Timeline

  1. Jun 12, 2026 · Jun 12, 2026
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Jul 19, 2026 · 16d ago
    Official fix available
    A vendor patch or mitigation now exists — see the remediation steps above.
  3. Aug 3, 2026 · 13h ago
    Advisory updated
    The NVD record was last revised.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeChanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactNone
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
CVE-2026-44990: A vulnerability in the sanitize-html library used by ApostropheCMS all · Vulnary