CVE-2026-106632: Adobe Experience Manager XSS Vulnerability

CVE-2026-106632 Overview

CVE-2026-106632 is a DOM-based Cross-Site Scripting (XSS) vulnerability affecting Adobe Experience Manager (AEM). An attacker can manipulate the Document Object Model (DOM) environment to execute arbitrary JavaScript in the victim's browser session. Exploitation requires authenticated low-privilege access and user interaction, specifically a victim visiting a crafted webpage. The vulnerability carries a changed scope, meaning executed code can affect resources beyond the vulnerable component. The issue is tracked under [CWE-79] and addressed in Adobe Security Advisory APSB26-152.

Critical Impact
Successful exploitation allows execution of malicious JavaScript in the victim's browser context, enabling session token theft, UI manipulation, and unauthorized actions against the AEM instance.

Affected Products

Adobe Experience Manager (per Adobe Security Advisory APSB26-152)
Specific affected versions listed in the Adobe advisory
Both AEM Cloud Service and on-premise deployments where applicable

Discovery Timeline

2026-10-13 - CVE-2026-106632 published to NVD
2026-10-14 - Last updated in NVD database
Refer to the Adobe Security Advisory APSB26-152 for vendor disclosure details

Technical Details for CVE-2026-106632

Vulnerability Analysis

The vulnerability is a DOM-based Cross-Site Scripting flaw within Adobe Experience Manager. Unlike reflected or stored XSS, DOM-based XSS occurs entirely in the client-side script when untrusted data flows into a dangerous DOM sink without proper sanitization. The attacker crafts a URL or page content that manipulates client-side JavaScript into writing attacker-controlled values into execution contexts such as innerHTML, document.write, or eval. Because the scope is changed, injected script can access resources outside the vulnerable component's security boundary, broadening the impact on confidentiality and integrity. User interaction is required: the victim must visit a crafted page while authenticated to the AEM instance.

Root Cause

The root cause is insufficient neutralization of input used in a web page [CWE-79], specifically within client-side JavaScript that consumes attacker-controlled DOM sources such as location.hash, location.search, or document.referrer. The data reaches a DOM sink without encoding or validation, allowing script execution.

Attack Vector

The attack vector is network-based and requires low-privilege authentication to the AEM environment plus user interaction. An attacker sends a crafted link to an authenticated AEM user. When the victim loads the link, vulnerable client-side script processes attacker-controlled DOM data and executes injected JavaScript in the victim's browser under the AEM origin.

No verified proof-of-concept code is published. See the Adobe Security
Advisory APSB26-152 for vendor-supplied technical detail.

Detection Methods for CVE-2026-106632

Indicators of Compromise

Unusual URL fragments or query parameters containing JavaScript syntax such as <script>, javascript:, onerror=, or encoded variants directed at AEM endpoints
Outbound requests from authenticated AEM user sessions to unexpected external hosts shortly after visiting a referrer link
AEM access logs showing authenticated users loading URLs with abnormally long or obfuscated fragment identifiers

Detection Strategies

Inspect web proxy and WAF logs for requests to AEM paths containing XSS payload signatures in URL parameters or fragments
Deploy Content Security Policy (CSP) violation reporting to surface inline script execution attempts in AEM pages
Correlate authenticated AEM session activity with anomalous DOM-triggered network calls from user browsers

Monitoring Recommendations

Monitor AEM author and publish instance logs for unexpected URL patterns targeting content fragments and component rendering endpoints
Alert on new or modified AEM user accounts, permission changes, or content modifications originating from suspicious sessions
Track browser error telemetry and CSP violation reports from endpoints accessing AEM for script-src and inline execution blocks

How to Mitigate CVE-2026-106632

Immediate Actions Required

Apply the Adobe patch referenced in APSB26-152 to all affected AEM instances
Review and restrict AEM author access to the minimum required set of authenticated users
Educate AEM users to avoid clicking untrusted links while logged into author or publish environments

Patch Information

Adobe has published fixed versions in Security Advisory APSB26-152. Administrators should consult the advisory for the exact patched build numbers and apply updates during the next maintenance window. AEM Cloud Service customers receive the fix via Adobe's managed update cycle.

Workarounds

Deploy a strict Content Security Policy on AEM delivery that disallows inline scripts and restricts script-src to trusted origins
Enable WAF rules that block common XSS payload patterns in query strings and fragments for AEM endpoints
Restrict network exposure of AEM author instances to VPN or trusted administrative networks until patching is complete

bash

# Example Content-Security-Policy response header for AEM dispatcher
# Add to the dispatcher or front-end web server configuration
Header always set Content-Security-Policy "default-src 'self'; \
  script-src 'self'; object-src 'none'; base-uri 'self'; \
  frame-ancestors 'self'; report-uri /csp-report"