Splunk Enterprise/Cloud Platform Trusted Domain information disclosure

Summaryinfo

A vulnerability categorized as problematic has been discovered in Splunk Enterprise and Cloud Platform. This affects an unknown function of the component Trusted Domain Handler. The manipulation results in information disclosure. This vulnerability is cataloged as CVE-2026-20257. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Splunk Enterprise and Cloud Platform (affected version unknown). Affected is an unknown functionality of the component Trusted Domain Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, and Splunk Cloud Platform versions below 10.3.2512.13, 10.2.2510.15, 10.1.2507.23, and 9.3.2411.132, a low-privileged user that does not hold the "admin" or "power" Splunk roles could craft a classic dashboard that exfiltrates sensitive data from the browser of a higher-privileged user who views it. The exfiltration is possible because classic dashboard panels do not fully validate style attribute values, which can allow for requests to reach external domains outside the configured Trusted Domains List. The vulnerability requires the attacker to phish the victim by tricking them into initiating a request within their browser. The low-privileged user should not be able to exploit the vulnerability at will.

The advisory is shared for download at advisory.splunk.com. This vulnerability is traded as CVE-2026-20257 since 10/08/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Log Management Software

Vendor

• Splunk

Name

• Cloud Platform
• Enterprise

License

• commercial

CPE 2.3info

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CPE 2.2info

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