Medium severity · published May 20, 2026
CVE-2026-20239
Sensitive Information Disclosure through Log Files in Splunk Enterprise
6.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SC
Splunk Cloud Platform · Splunk
10.3.2512 before 10.3.2512.8; 10.2.2510 before 10.2.2510.11; 10.1.2507 before 10.1.2507.21; 10.0.2503 before 10.0.2503.13 · source: vendor, NVD
SE
Splunk Enterprise · Splunk
10.2 before 10.2.2; 10.0 before 10.0.5 · source: vendor
SP
Splunk · Splunk
10.0.0 before 10.0.5; 10.2.0 before 10.2.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20239
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20239
Vendor Advisory
https://advisory.splunk.com/advisories/SVD-2026-0503
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