Denial of Service (DoS) in Splunk Enterprise Using a Malformed SAML Request

Description

In Splunk Enterprise versions lower than 9.0.6 and 8.2.12, a malicious actor can send a malformed security assertion markup language (SAML) request to the `/saml/acs` REST endpoint which can cause a denial of service through a crash or hang of the Splunk daemon.

Scores

EPSS (exploitation in 30 days)

0.58% · top 52% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.3.

Weakness

• CWE-400: The software does not properly control the allocation and maintenance of a limited resource thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. (opens in a new tab)All about CWE-400 and its CVEs

Affected products

• Splunk · Splunk Enterprise

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

• Splunk · Splunk Cloud

  • affected - – < 9.0.2205

References (2)

• https://advisory.splunk.com/advisories/SVD-2023-0802 (opens in a new tab)x_transferred
• https://research.splunk.com/application/8e8a86d5-f323-4567-95be-8e817e2baee6/ (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-2023-40593](https://trackcve.app/badge/CVE-2023-40593.svg)](https://trackcve.app/cve/CVE-2023-40593)

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