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Vulnerabilities

Vulnerability · 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 · catalog updated Jun 17, 2026 · the affected product

Check if you run it

No confirmed exploitation is on record for CVE-2026-20205. EPSS is 0.28%. Act only if a listed version of the affected product is installed.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.28%
Remediation
Advisory link
Affected products
See sources for product scope

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.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-20205

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-20205. EPSS is 0.28%. Act only if a listed version of the affected product is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-532: Insertion of Sensitive Information into Log File. EPSS 0.28%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

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.

  1. 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

  2. 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

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.