CVE-2026-20239: Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information. in Splunk Splunk Enterprise
In Splunk Enterprise versions below 10.2.2 and 10.0.5, and Splunk Cloud Platform versions below 10.3.2512.8, 10.2.2510.11, 10.1.2507.21, and 10.0.2503.13, a user with a role that has access to the `_internal` index could view session cookies and response bodies that contain sensitive data.
AI Analysis
Technical Summary
This vulnerability in Splunk Enterprise (versions below 10.2.2 and 10.0.5) and Splunk Cloud Platform (versions below 10.3.2512.8, 10.2.2510.11, 10.1.2507.21, and 10.0.2503.13) allows a user with a role that has access to the _internal index to view sensitive information such as session cookies and response bodies logged in the system. This information leakage could provide attackers with valuable data to compromise user sessions or gain further access. The CVSS 3.1 vector indicates network attack vector, high complexity, low privileges required, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability.
Potential Impact
Sensitive session cookies and response bodies containing confidential user data can be accessed by users with access to the _internal index. This can lead to unauthorized disclosure of sensitive information, potentially enabling further attacks or unauthorized access. The vulnerability impacts confidentiality, integrity, and availability as indicated by the CVSS score.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the _internal index to only trusted users with a strict need-to-know basis. Monitor Splunk's official channels for updates and apply patches promptly once released.
CVE-2026-20239: Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information. in Splunk Splunk Enterprise
Description
In Splunk Enterprise versions below 10.2.2 and 10.0.5, and Splunk Cloud Platform versions below 10.3.2512.8, 10.2.2510.11, 10.1.2507.21, and 10.0.2503.13, a user with a role that has access to the `_internal` index could view session cookies and response bodies that contain sensitive data.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Splunk Enterprise (versions below 10.2.2 and 10.0.5) and Splunk Cloud Platform (versions below 10.3.2512.8, 10.2.2510.11, 10.1.2507.21, and 10.0.2503.13) allows a user with a role that has access to the _internal index to view sensitive information such as session cookies and response bodies logged in the system. This information leakage could provide attackers with valuable data to compromise user sessions or gain further access. The CVSS 3.1 vector indicates network attack vector, high complexity, low privileges required, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability.
Potential Impact
Sensitive session cookies and response bodies containing confidential user data can be accessed by users with access to the _internal index. This can lead to unauthorized disclosure of sensitive information, potentially enabling further attacks or unauthorized access. The vulnerability impacts confidentiality, integrity, and availability as indicated by the CVSS score.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the _internal index to only trusted users with a strict need-to-know basis. Monitor Splunk's official channels for updates and apply patches promptly once released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisco
- Date Reserved
- 2025-10-08T11:59:15.400Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a0df486ba1db4736293a1c3
Added to database: 5/20/2026, 5:51:02 PM
Last enriched: 5/20/2026, 5:51:21 PM
Last updated: 5/21/2026, 5:39:48 AM
Views: 7
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