CVE-2026-75716 Overview
CVE-2026-75716 is a DOM-based Cross-Site Scripting (XSS) vulnerability [CWE-79] affecting Adobe Experience Manager (AEM). An attacker can manipulate the Document Object Model (DOM) environment to execute malicious JavaScript within the victim's browser context. Successful exploitation requires user interaction, specifically the victim visiting a crafted webpage. The scope is changed, meaning the vulnerable component can affect resources beyond its own security authority.
The vulnerability affects the AEM Cloud Service as well as AEM 6.5 LTS (including SP1 and SP2). Adobe published the fix in security advisory APSB26-98.
Critical Impact
Attackers can execute arbitrary JavaScript in the victim's browser session, enabling session compromise, data theft, and unauthorized actions within the AEM administrative context.
Affected Products
- Adobe Experience Manager Cloud Service (aem_cloud_service)
- Adobe Experience Manager 6.5 LTS
- Adobe Experience Manager 6.5 LTS SP1 and SP2
Discovery Timeline
- 2026-09-08 - CVE-2026-75716 published to NVD
- 2026-09-10 - Last updated in NVD database
Technical Details for CVE-2026-75716
Vulnerability Analysis
CVE-2026-75716 is a DOM-based XSS flaw within Adobe Experience Manager. Unlike reflected or stored XSS, DOM-based XSS occurs entirely on the client side. The vulnerable JavaScript reads attacker-controllable data from a source such as location.hash, document.URL, or document.referrer and writes it into a dangerous sink such as innerHTML, document.write, or eval without proper sanitization.
The vulnerability carries a changed scope, indicating the injected script can affect components beyond the initially vulnerable one, such as parent frames or authenticated administrative contexts. Exploitation requires an authenticated user with low privileges to interact with a crafted page or link.
The Exploit Prediction Scoring System (EPSS) score is 0.249% with a percentile of 16.27, indicating a low likelihood of near-term exploitation. No public proof-of-concept exploit is available at this time.
Root Cause
The root cause is improper neutralization of input during web page generation on the client side. AEM's JavaScript accepts attacker-influenced data from the DOM and passes it to an execution sink without validation or encoding. This allows arbitrary script content to be interpreted as executable code within the victim's session.
Attack Vector
The attack begins with a crafted URL or webpage containing a malicious payload embedded in a DOM source. An authenticated AEM user visits the attacker-controlled page or clicks a crafted link pointing to an AEM interface. Client-side JavaScript then extracts the payload and injects it into a DOM sink, executing the attacker's code within the AEM origin. Because the scope is changed, the payload can access resources beyond the immediate component.
No verified exploitation code is publicly available. Refer to the Adobe Security Advisory APSB26-98 for vendor-provided details.
Detection Methods for CVE-2026-75716
Indicators of Compromise
- Anomalous URL parameters, fragments, or hash values containing HTML tags, JavaScript keywords, or encoded script content targeting AEM endpoints.
- Unexpected outbound requests from authenticated AEM author or admin sessions to attacker-controlled domains, indicating potential data exfiltration.
- Browser console errors or content security policy (CSP) violations originating from AEM pages accessed by privileged users.
Detection Strategies
- Deploy web application firewall (WAF) rules that inspect requests to AEM endpoints for XSS payload patterns, including <script>, javascript:, and event handler attributes.
- Enable and monitor Content Security Policy reporting to capture inline script violations from AEM origins.
- Correlate authenticated AEM session activity with unusual JavaScript execution patterns or outbound HTTP requests to non-corporate domains.
Monitoring Recommendations
- Log and review all AEM administrative session activity, focusing on requests that carry unusual query strings, fragments, or referrer values.
- Monitor endpoint telemetry from AEM author and admin workstations for browser-based credential theft or session token exfiltration attempts.
- Track access to AEM login, preview, and content management URLs from external referrers or unfamiliar IP ranges.
How to Mitigate CVE-2026-75716
Immediate Actions Required
- Apply the security updates published in Adobe Security Advisory APSB26-98 to all affected AEM Cloud Service and AEM 6.5 LTS instances.
- Inventory all AEM deployments to confirm patch coverage, including SP1 and SP2 branches of the 6.5 LTS release.
- Instruct AEM authors and administrators to avoid clicking untrusted links and to log out of AEM when not actively using it.
Patch Information
Adobe has released patches addressing CVE-2026-75716 under security bulletin APSB26-98. Customers running AEM Cloud Service should confirm their environment is on the current release. AEM 6.5 LTS customers must upgrade to the fixed service pack listed in the advisory. Consult the Adobe Security Advisory APSB26-98 for exact version requirements.
Workarounds
- Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins to reduce DOM XSS impact.
- Restrict AEM administrative interface access to trusted networks or VPN users, limiting exposure of authenticated sessions to internet-borne crafted pages.
- Configure browsers used by AEM administrators with script-blocking extensions and same-site cookie enforcement to reduce cross-context script execution risk.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.