Remote Code Execution via Serialized Session Payload

Description

In Splunk Enterprise versions lower than 8.2.12, 9.0.6, and 9.1.1, an attacker can execute a specially crafted query that they can then use to serialize untrusted data. The attacker can use the query to execute arbitrary code.

Scores

EPSS (exploitation in 30 days)

0.90% · top 40% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.

Weakness

• CWE-502: The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid. (opens in a new tab)All about CWE-502 and its CVEs

Affected products

• Splunk · Splunk Enterprise

  • affected 8.2 – < 8.2.12
  • affected 9.0 – < 9.0.6
  • affected 9.1 – < 9.1.1

• Splunk · Splunk Cloud

  • affected - – < 9.0.2305.200

References (2)

• https://advisory.splunk.com/advisories/SVD-2023-0804 (opens in a new tab)x_transferred
• https://research.splunk.com/application/d1d8fda6-874a-400f-82cf-dcbb59d8e4db/ (opens in a new tab)x_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2023-40595](https://trackcve.app/badge/CVE-2023-40595.svg)](https://trackcve.app/cve/CVE-2023-40595)

Record last updated 28 Feb 2025, 11:03 UTC.