CVE-2026-110082: Adobe Experience Manager XSS Vulnerability

CVE-2026-110082 Overview

CVE-2026-110082 is a reflected Cross-Site Scripting (XSS) vulnerability affecting Adobe Experience Manager (AEM). A low-privileged attacker can craft a malicious URL that, when visited by an authenticated victim, executes attacker-controlled JavaScript in the victim's browser session. The flaw is tracked under [CWE-79] (Improper Neutralization of Input During Web Page Generation).

The vulnerability requires user interaction and low-level privileges but results in a scope change, meaning the executed script can affect resources beyond the vulnerable component. Adobe published advisory APSB26-152 to address the issue.

Critical Impact
Successful exploitation enables session token theft, UI defacement, and unauthorized actions performed in the context of the victim's AEM session.

Affected Products

Adobe Experience Manager (specific versions listed in Adobe advisory APSB26-152)

Discovery Timeline

2026-10-13 - CVE-2026-110082 published to NVD
2026-10-14 - Last updated in NVD database

Technical Details for CVE-2026-110082

Vulnerability Analysis

The vulnerability is a reflected XSS flaw in Adobe Experience Manager. User-supplied input in a URL parameter is reflected into a rendered page without adequate output encoding or input sanitization. When a victim loads the crafted URL, the browser interprets the injected payload as executable JavaScript.

The CVSS vector indicates a scope change, meaning the injected script can affect components or data beyond the vulnerable page. In an AEM deployment, this typically includes administrative interfaces, author instances, and content repositories accessible to the victim's session.

The EPSS score of 0.362% reflects a low current probability of exploitation activity, but reflected XSS flaws in enterprise CMS platforms are commonly weaponized through phishing campaigns targeting content authors and administrators.

Root Cause

The root cause is improper neutralization of user-controlled input [CWE-79]. A request parameter is echoed back into the HTML response without context-appropriate encoding. The AEM page template fails to escape characters such as <, >, and " before rendering them in the response body or an attribute context.

Attack Vector

An attacker with low privileges on the AEM instance crafts a URL that embeds a JavaScript payload within a vulnerable parameter. The attacker delivers the URL to a victim through phishing, chat, or embedded links. When the victim—typically an authenticated AEM user—visits the URL, the script executes in their browser.

Because scope is changed, the payload can access cookies, session identifiers, and CSRF tokens that permit further actions against AEM content and configuration APIs. The attacker can escalate by chaining the XSS with privileged actions available to the victim's role.

No verified public proof-of-concept exploit code is available. Refer to the Adobe Security Advisory APSB26-152 for vendor-provided technical details.

Detection Methods for CVE-2026-110082

Indicators of Compromise

HTTP request logs containing URL parameters with <script>, javascript:, onerror=, or encoded variants such as %3Cscript%3E
Unusual outbound requests from AEM user browsers to attacker-controlled domains carrying session cookies or form data
Content modifications in AEM authored by users whose sessions coincide with suspicious inbound referrer URLs

Detection Strategies

Inspect web server and reverse proxy logs for requests to AEM endpoints containing script-like characters in query strings
Deploy a Web Application Firewall (WAF) rule set that flags reflected input containing HTML or JavaScript control characters
Correlate authenticated AEM sessions with external referrers from untrusted domains to identify phishing-driven exploitation

Monitoring Recommendations

Enable Content Security Policy (CSP) violation reporting to capture inline script execution attempts in AEM pages
Forward AEM access logs and WAF alerts into a centralized SIEM for correlation with user activity
Monitor for anomalous administrative actions following URL click events in email or messaging telemetry

How to Mitigate CVE-2026-110082

Immediate Actions Required

Apply the Adobe security updates referenced in advisory APSB26-152 to all AEM author and publish instances
Review AEM user roles and restrict content author access to only required functions, reducing the impact of a hijacked session
Notify AEM users to avoid clicking AEM URLs received through unsolicited email or external channels until patches are deployed

Patch Information

Adobe has released fixes documented in the Adobe Security Advisory APSB26-152. Administrators should identify the deployed AEM version and apply the vendor-supplied service pack or cumulative fix pack corresponding to that release.

Workarounds

Enforce a strict Content Security Policy that disallows inline script execution and restricts script sources to trusted origins
Place AEM instances behind a WAF with signatures that block common XSS payload patterns in query strings
Restrict access to AEM author instances using network segmentation, VPN requirements, or IP allow-listing to limit exposure

bash

# Example CSP response header to reduce reflected XSS impact
Content-Security-Policy: default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'