Inclusion of Sensitive Information in Log Files in Splunk Enterprise - CVE-2026-20239
Published: May 21, 2026
Vulnerability identifier: #VU132090
CSH Severity: Low
CVSS v4: 6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20239
CWE-ID: CWE-532
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to missing output buffer sanitization in the TcpChannel component when discarding data during socket errors. A remote user can access the _internal index to disclose sensitive information.
Exposed data may include session cookies and response bodies containing sensitive information.
Affected software
Splunk Enterprise
How to mitigate CVE-2026-20239
Install security update from vendor's website.
Splunk Enterprise - addressed in versions 10.0.5, 10.2.2