CVE-2026-47982: Adobe Experience Manager XSS Vulnerability

CVE-2026-47982 Overview

CVE-2026-47982 is a DOM-based Cross-Site Scripting (XSS) vulnerability affecting Adobe Experience Manager (AEM). The flaw exists in versions 6.5.24, LTS SP1, 2026.04, and earlier releases. Attackers can manipulate the DOM environment to execute arbitrary JavaScript within the victim's browser context. Successful exploitation requires the victim to visit a crafted webpage and requires low-privileged authentication on the targeted instance. The vulnerability carries a changed scope, meaning the impact extends beyond the vulnerable component to other security domains. The issue is tracked under [CWE-79] and falls under the broader category of Web Application Vulnerabilities.

Critical Impact
Authenticated attackers can execute JavaScript in victim browsers through crafted DOM manipulation, enabling session hijacking, content modification, and credential theft within AEM-served pages.

Affected Products

Adobe Experience Manager 6.5.24 and earlier
Adobe Experience Manager LTS SP1
Adobe Experience Manager 2026.04 and earlier (including AEM Cloud Service)

Discovery Timeline

2026-06-09 - CVE-2026-47982 published to NVD
2026-06-10 - Last updated in NVD database

Technical Details for CVE-2026-47982

Vulnerability Analysis

The vulnerability is a DOM-based XSS flaw within Adobe Experience Manager. DOM-based XSS occurs when client-side JavaScript reads attacker-controlled data from a source such as location.hash, document.referrer, or window.name and writes it into a sink that interprets the value as executable markup. In this case, AEM components process URL-supplied data without proper sanitization before passing it to a DOM sink, allowing script execution in the victim's session.

The Common Vulnerability Scoring System (CVSS) vector indicates network exploitability with low attack complexity, but exploitation requires both an authenticated session and victim interaction. Because the scope is changed, the executed script can affect resources outside the original AEM security boundary, including authoring tools, preview environments, or linked services consuming AEM-rendered output.

Root Cause

The root cause is improper neutralization of input during web page generation on the client side [CWE-79]. AEM client-side code accepts data from a controllable source and writes it into a DOM sink, such as innerHTML, document.write, or an event handler attribute, without contextual encoding. The flaw resides in client-rendered components rather than server-side templates.

Attack Vector

An authenticated attacker crafts a URL containing a malicious payload targeting the vulnerable DOM sink. The attacker then convinces a victim with an active AEM session to load the crafted URL. The victim's browser parses the response, executes the JavaScript, and grants the attacker access to session cookies, form data, and authoring functions reachable from the compromised context.

No verified exploit code is publicly available. Refer to the Adobe Security Advisory APSB26-56 for vendor technical detail.

Detection Methods for CVE-2026-47982

Indicators of Compromise

HTTP requests to AEM endpoints containing URL fragments or query parameters with JavaScript keywords such as <script>, javascript:, onerror=, or encoded equivalents.
Unexpected outbound connections from authenticated AEM author or publish sessions to attacker-controlled domains.
Browser console errors or content-security-policy violations originating from AEM-served pages.

Detection Strategies

Inspect web server and reverse proxy logs for AEM request URIs containing suspicious DOM-payload patterns and unusual referrers.
Deploy a Content Security Policy (CSP) in report-only mode and monitor violation reports for inline script execution attempts.
Correlate AEM authentication events with anomalous session activity such as unexpected page edits or API calls following URL clicks.

Monitoring Recommendations

Enable verbose access logging on AEM dispatcher and author instances and forward logs to a centralized analytics platform.
Monitor authenticated user behavior for deviations from baseline editing or publishing patterns.
Track referrer chains leading users to AEM URLs from external or untrusted domains.

How to Mitigate CVE-2026-47982

Immediate Actions Required

Apply the Adobe security updates referenced in Adobe Security Advisory APSB26-56 to all affected AEM 6.5, LTS, and Cloud Service instances.
Audit AEM user accounts and revoke unused or excessive privileges to reduce the pool of accounts that can trigger the flaw.
Enforce a strict Content Security Policy on AEM-delivered pages to constrain inline script execution.

Patch Information

Adobe released fixed builds for Adobe Experience Manager 6.5, LTS SP1, and 2026.04 in coordination with this advisory. Customers running AEM Cloud Service receive the update through Adobe's managed release channel. Consult Adobe Security Advisory APSB26-56 for exact version numbers and download paths.

Workarounds

Restrict access to AEM author instances using IP allowlists or VPN segmentation until patches are deployed.
Configure a web application firewall to filter requests containing common DOM-XSS payload patterns targeting AEM URIs.
Train content authors and administrators to avoid clicking AEM links received from untrusted sources while authenticated.

bash

# Example WAF rule pattern (ModSecurity) to block common DOM-XSS payloads against AEM
SecRule REQUEST_URI "@rx (?i)(<script|javascript:|onerror=|onload=|%3Cscript)" \
    "id:1009482,phase:1,deny,status:403,msg:'Potential DOM-XSS payload targeting AEM (CVE-2026-47982)'"