CVE-2026-20239

medium

Published 2026-05-20 · Modified 2026-05-21

CVSS v3

6.5

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS v2

—

VIR risk

6.5

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.

Predictions

Exploit likelihood

75%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: psirt@cisco.com — https://advisory.splunk.com/advisories/SVD-2026-0503

Application impact

Vendor	Product	Versions	Fixed
splunk	splunk	`{"startIncluding":"10.0.0","endExcluding":"10.0.5"}`	`10.0.5`
splunk	splunk_cloud_platform	`{"startIncluding":"10.0.2503","endExcluding":"10.0.2503.13"}`	`10.0.2503.13`

References

https://advisory.splunk.com/advisories/SVD-2026-0503

CWEs

CWE-532

Verify integrity in audit chain (admin only). AS-IS.