CVE-2026-20239

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.5% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-05-20 18:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-07-23 12:10 UTC Last updatedMost recent change to the record

Details

Published

2026-05-20 18:16 UTC

Last modified

2026-07-23 12:10 UTC

Exploit probability

0.5% · EPSS, next 30 days

Weakness

CWE-532 · Secrets in logs

Record status

Analyzed

Affected

• Splunk < 10.0.5
• Splunk < 10.2.2
• Splunk Cloud Platform < 10.0.2503.13
• Splunk Cloud Platform < 10.1.2507.21
• Splunk Cloud Platform < 10.2.2510.11
• Splunk Cloud Platform < 10.3.2512.8

Attack profile CVSS 3.1 · 7.5

Attack vector

Network

Complexity

High

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High