CVE-2026-75692: Adobe Experience Manager XSS Vulnerability

CVE-2026-75692 Overview

CVE-2026-75692 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 malicious JavaScript within the context of the victim's browser. Exploitation requires a low-privileged authenticated attacker to craft a webpage that a victim must visit. Because scope is changed, the injected script can affect resources beyond the vulnerable component's security authority. The flaw is categorized under CWE-79 (Improper Neutralization of Input During Web Page Generation).

Critical Impact
Successful exploitation enables client-side script execution in the victim's browser session, potentially exposing session tokens, authenticated AEM content, and other confidential data within the browser context.

Affected Products

Adobe Experience Manager (AEM Cloud Service)
Adobe Experience Manager 6.5 LTS (base, SP1, SP2)
Adobe Experience Manager on-premises versions covered by advisory APSB26-98

Discovery Timeline

2026-09-08 - CVE-2026-75692 published to NVD
2026-09-10 - Last updated in NVD database

Technical Details for CVE-2026-75692

Vulnerability Analysis

CVE-2026-75692 is a client-side injection flaw within Adobe Experience Manager. The vulnerable JavaScript reads attacker-controllable input from a DOM source (such as location.hash, location.search, or document.referrer) and passes it to a dangerous sink (such as innerHTML, document.write, or eval) without adequate sanitization or encoding. Because processing occurs entirely in the browser, the malicious payload never reaches server logs, making the issue harder to observe from server-side telemetry.

Exploitation requires user interaction: the victim must load a crafted URL or page that triggers the vulnerable script path. The scope-changed nature indicates the injected script executes in a security context different from the vulnerable component, expanding the reach of the attack beyond AEM's immediate boundary.

Root Cause

The root cause is improper neutralization of untrusted input within an AEM client-side script. Data flowing from a browser-controlled source into an HTML or script-executing sink is not encoded or validated, allowing attacker-supplied markup to be parsed as executable JavaScript. See the Adobe Security Advisory APSB26-98 for the component-level fix summary.

Attack Vector

An authenticated attacker with low privileges on an AEM instance crafts a URL containing a malicious DOM payload. The attacker delivers the URL to a victim through phishing, embedded links, or social engineering. When the victim's browser processes the URL, the vulnerable AEM script parses the attacker-supplied fragment and injects it into the DOM, executing arbitrary JavaScript in the victim's authenticated session. The scope change permits the payload to interact with resources outside the vulnerable component's origin authority.

No public proof-of-concept is available. Refer to Adobe advisory APSB26-98
for technical remediation details.

Detection Methods for CVE-2026-75692

Indicators of Compromise

Unusual URL fragments (#) or query parameters containing HTML tags, javascript: URIs, or encoded script payloads directed at AEM author or publish endpoints.
Browser console errors or Content Security Policy (CSP) violation reports referencing inline script execution on AEM pages.
Outbound requests from authenticated AEM user sessions to unfamiliar external domains shortly after visiting a crafted link.

Detection Strategies

Deploy CSP with report-uri or report-to directives on AEM instances to capture script-source violations that indicate injection attempts.
Inspect web proxy and reverse proxy logs for URI patterns containing script tokens (<script, onerror=, javascript:) targeting AEM paths.
Correlate authenticated AEM session activity with anomalous JavaScript-triggered network callbacks using centralized logging.

Monitoring Recommendations

Ingest AEM dispatcher and web server logs into a SIEM or data lake and alert on suspicious fragment or referrer patterns.
Monitor for phishing campaigns referencing internal AEM hostnames to identify potential victim targeting.
Track browser telemetry (via EDR or browser isolation tooling) for anomalous script execution on AEM domains.

How to Mitigate CVE-2026-75692

Immediate Actions Required

Apply the security update referenced in Adobe Security Advisory APSB26-98 to all AEM Cloud Service, AEM 6.5 LTS, and affected on-premises deployments.
Audit AEM user accounts and remove unused low-privilege accounts that could be leveraged for exploitation.
Educate content authors and administrators about phishing links referencing internal AEM URLs.

Patch Information

Adobe published fixes under advisory APSB26-98. Administrators should upgrade AEM Cloud Service to the current release and apply the LTS service pack update covering 6.5, 6.5 SP1, and 6.5 SP2. Consult the vendor advisory for exact package versions and installation guidance.

Workarounds

Enforce a strict Content Security Policy on AEM author and publish tiers to block inline script execution and untrusted script sources.
Configure AEM Dispatcher rules to reject requests containing suspicious fragment or query patterns commonly used in DOM XSS payloads.
Require multi-factor authentication for AEM accounts to reduce the impact of session compromise following a successful XSS.

bash

# Example AEM Dispatcher filter to block script-like query parameters
/0100 { /type "deny" /url "*<script*" }
/0101 { /type "deny" /url "*javascript:*" }
/0102 { /type "deny" /url "*onerror=*" }