CVE-2026-75714: Adobe Experience Manager XSS Vulnerability

CVE-2026-75714 Overview

CVE-2026-75714 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 within the context of a victim's browser session. Exploitation requires user interaction, specifically that the victim visit a crafted webpage. The vulnerability has a changed scope, meaning successful exploitation can impact resources beyond the vulnerable component. The issue is tracked under CWE-79 (Improper Neutralization of Input During Web Page Generation).

Critical Impact
Successful exploitation allows an attacker to execute malicious JavaScript in the victim's browser, potentially enabling session hijacking, credential theft, or unauthorized actions within the AEM application.

Affected Products

Adobe Experience Manager (on-premise)
Adobe Experience Manager as a Cloud Service (AEM Cloud Service)
Adobe Experience Manager 6.5 LTS (including SP1 and SP2)

Discovery Timeline

2026-09-08 - CVE-2026-75714 published to the National Vulnerability Database (NVD)
2026-09-10 - Last updated in NVD database

Technical Details for CVE-2026-75714

Vulnerability Analysis

CVE-2026-75714 is a client-side DOM-based XSS flaw in Adobe Experience Manager. Unlike reflected or stored XSS, DOM-based XSS occurs entirely within the browser when client-side JavaScript writes attacker-controlled data into a dangerous DOM sink without proper sanitization. The vulnerability requires low privileges and user interaction, and its scope is marked as changed, indicating the injected script can affect components beyond the vulnerable AEM instance. Impact on confidentiality and integrity is limited, and there is no direct impact on availability.

Root Cause

The root cause is improper neutralization of user-controlled input during web page generation on the client side. AEM client-side JavaScript processes untrusted data from sources such as location.hash, location.search, or document.referrer and passes it to sinks such as innerHTML, document.write, or eval without adequate encoding or validation. This enables an attacker to inject and execute JavaScript within the origin of the AEM application.

Attack Vector

Exploitation requires an authenticated user with low privileges to visit a crafted URL or webpage that triggers the vulnerable client-side code path. The attacker embeds malicious JavaScript in a URL fragment or query parameter that AEM's client-side script consumes and injects into the DOM. When the victim visits the crafted page, the payload executes in their browser under the AEM origin, enabling actions such as exfiltrating session tokens, performing actions on behalf of the victim, or pivoting to other application resources due to the changed scope.

No verified proof-of-concept code is publicly available. Refer to the Adobe Experience Manager Security Advisory (APSB26-98) for additional technical details.

Detection Methods for CVE-2026-75714

Indicators of Compromise

Unusual URL parameters or fragment identifiers containing JavaScript-like syntax (for example, javascript:, <script>, onerror=) directed at AEM endpoints.
Unexpected outbound HTTP requests from authenticated AEM user sessions to attacker-controlled domains.
Anomalous JavaScript execution or DOM modifications logged by browser-side monitoring or Content Security Policy (CSP) violation reports.

Detection Strategies

Deploy a Content Security Policy in report-only or enforcement mode to surface inline script execution and unauthorized script sources within AEM.
Inspect web server and reverse proxy logs for requests containing encoded XSS payloads targeting AEM URLs.
Correlate authenticated AEM session activity with subsequent anomalous browser behavior, such as unexpected API calls or session token access.

Monitoring Recommendations

Ingest AEM access logs and CSP violation reports into a centralized SIEM for correlation and alerting on XSS payload patterns.
Monitor endpoint telemetry for browser processes making unexpected network connections or spawning child processes after AEM interaction.
Track privileged AEM user sessions for behavior indicative of session hijacking, such as concurrent logins from disparate geographies.

How to Mitigate CVE-2026-75714

Immediate Actions Required

Apply the security updates referenced in the Adobe APSB26-98 advisory to all AEM instances, including on-premise, Cloud Service, and 6.5 LTS deployments.
Audit AEM user accounts and revoke unnecessary low-privilege access that could be leveraged for exploitation.
Educate authors, editors, and administrators to avoid clicking suspicious links referencing AEM URLs.

Patch Information

Adobe published patches for affected Experience Manager versions in security bulletin APSB26-98. Customers on AEM Cloud Service receive updates automatically through the managed release channel. Customers running AEM 6.5 LTS and on-premise deployments must apply the vendor-provided service packs. Consult the Adobe Experience Manager Security Advisory for exact version and hotfix identifiers.

Workarounds

Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins.
Restrict AEM author and admin interfaces to trusted networks or VPN access to reduce exposure to crafted external links.
Configure web application firewall (WAF) rules to filter requests containing common DOM-XSS payload patterns targeting AEM endpoints.

bash

# Example Content Security Policy header for AEM responses
Content-Security-Policy: default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'; report-uri /csp-report