CVE-2026-20205
In Splunk MCP Server app versions below 1.0.3 , a user who holds a role with access to the Splunk index or possesses the high-privilege capability could view users ses…
Published Apr 15, 2026 · corrected/updated Jun 17, 2026 · evidence confidence high
In Splunk MCP Server app versions below 1.0.3 , a user who holds a role with access to the Splunk index or possesses the high-privilege capability could view users session and authorization tokens in clear text. The vulnerability would require either local access to the log files or administrative access to internal indexes, which by default only the admin role receives. Review roles and capabilities on your instance and restrict internal index access to administrator-level roles. See [Define roles on the Splunk platform with capabilities](https://docs.splunk.com/Documentation/Splunk/latest/Security/Rolesandcapabilities) and [Connecting to MCP Server and Admin settings](https://help.splunk.com/en/splunk-enterprise/mcp-server-for-splunk-platform/connecting-to-mcp-server-and-admin-settings) in the Splunk documentation for more information.
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2026-20205 is a high public vulnerability record for this product. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether this product is in your estate, then compare installed versions with the affected ranges. Affected version ranges have not been ingested yet. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 7.2, EPSS 0.3%. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-532. Sources contributing to this record: cve_org, epss, nvd. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Not listed as known exploited in CISA KEV. Not in the CISA KEV catalog.
Patch and remediation
No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Apr 15, 2026 · NIST NVD
Detected
In Splunk MCP Server app versions below 1.0.3 , a user who holds a role with access to the Splunk index or possesses the high-privilege capability could view users session and authorization tokens in clear text. The vulnerability would require either local access to the log files or administrative access to internal indexes, which by default only the admin role receives. Review roles and capabilit
Jun 17, 2026 · NIST NVD
Updated
In Splunk MCP Server app versions below 1.0.3 , a user who holds a role with access to the Splunk index or possesses the high-privilege capability could view users session and authorization tokens in clear text. The vulnerability would require either local access to the log files or administrative access to internal indexes, which by default only the admin role receives. Review roles and capabilit
Sources
- CVE.orgVulnerability recordCVE-2026-20205
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-20205
30-day exploitation probability 0.3%
first.org - NIST NVDVulnerability recordCVE-2026-20205
In Splunk MCP Server app versions below 1.0.3 , a user who holds a role with access to the Splunk index or possesses the high-privilege capability could view users session and authorization tokens in clear text. The vulnerability would require
nvd.nist.gov