CVE-2026-20239

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.6 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://advisory.splunk.com/advisories/SVD-2026-0503	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:splunk:splunk:::::enterprise:::*
	cpe:2.3:a:splunk:splunk:::::enterprise:::*

Configuration 2 (hide)

OR	cpe:2.3:a:splunk:splunk_cloud_platform::::::::
	cpe:2.3:a:splunk:splunk_cloud_platform::::::::
	cpe:2.3:a:splunk:splunk_cloud_platform::::::::
	cpe:2.3:a:splunk:splunk_cloud_platform::::::::

History

No history.

Information

Published : 2026-05-20 18:16

Updated : 2026-07-23 12:10

NVD link : CVE-2026-20239

Mitre link : CVE-2026-20239

CVE.ORG link : CVE-2026-20239

JSON object : View

Products Affected

splunk

splunk_cloud_platform
splunk

CWE

CWE-532

Insertion of Sensitive Information into Log File

{"id": "CVE-2026-20239", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20239", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-05-20T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "psirt@cisco.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.6}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "affected": [{"source": "psirt@cisco.com", "affectedData": [{"vendor": "Splunk", "product": "Splunk Enterprise", "versions": [{"status": "affected", "version": "10.2", "lessThan": "10.2.2", "versionType": "custom"}, {"status": "affected", "version": "10.0", "lessThan": "10.0.5", "versionType": "custom"}]}, {"vendor": "Splunk", "product": "Splunk Cloud Platform", "versions": [{"status": "affected", "version": "10.3.2512", "lessThan": "10.3.2512.8", "versionType": "custom"}, {"status": "affected", "version": "10.2.2510", "lessThan": "10.2.2510.11", "versionType": "custom"}, {"status": "affected", "version": "10.1.2507", "lessThan": "10.1.2507.21", "versionType": "custom"}, {"status": "affected", "version": "10.0.2503", "lessThan": "10.0.2503.13", "versionType": "custom"}]}]}], "published": "2026-05-20T18:16:26.520", "references": [{"url": "https://advisory.splunk.com/advisories/SVD-2026-0503", "tags": ["Vendor Advisory"], "source": "psirt@cisco.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-532"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "En las versiones de Splunk Enterprise anteriores a la 10.2.2 y la 10.0.5, y en las versiones de Splunk Cloud Platform anteriores a la 10.3.2512.8, la 10.2.2510.11, la 10.1.2507.21 y la 10.0.2503.13, un usuario con un rol que tiene acceso al \u00edndice '_internal' podr\u00eda ver las cookies de sesi\u00f3n y los cuerpos de respuesta que contienen datos sensibles."}], "lastModified": "2026-07-23T12:10:00.110", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*", "vulnerable": true, "matchCriteriaId": "D5A01879-50A5-4266-A08C-F55584F442ED", "versionEndExcluding": "10.0.5", "versionStartIncluding": "10.0.0"}, {"criteria": "cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*", "vulnerable": true, "matchCriteriaId": "9F3A147D-2A67-469A-A223-248DEFB413E0", "versionEndExcluding": "10.2.2", "versionStartIncluding": "10.2.0"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D5C098C2-9ED5-41B4-BE57-984B71027144", "versionEndExcluding": "10.0.2503.13", "versionStartIncluding": "10.0.2503"}, {"criteria": "cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2C302734-E81B-49DE-B3D6-ACD20DD3A57A", "versionEndExcluding": "10.1.2507.21", "versionStartIncluding": "10.1.2507"}, {"criteria": "cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5F7423BE-EADA-4D07-A021-D0F9EBBF966F", "versionEndExcluding": "10.2.2510.11", "versionStartIncluding": "10.2.2510"}, {"criteria": "cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8E24DFCE-B632-49F0-9198-A21636FC3D59", "versionEndExcluding": "10.3.2512.8", "versionStartIncluding": "10.3.2512"}], "operator": "OR"}]}], "sourceIdentifier": "psirt@cisco.com"}