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TI-2023-21391 Aliases CVE-2023-40593GHSA-qpqv-mwrg-mw8j

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

Priority LOW 34CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-400.

Summary

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.

Why it matters now

EPSS 0.00582 48th percentileScored 2026-11-07
Fix Fixed Splunk Enterprise (Splunk): 8.2.12, 9.0.6Splunk Cloud (Splunk): 9.0.2205

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
SplunkSplunk Enterprise8.2 to before 8.2.12; 9.0 to before 9.0.68.2.12, 9.0.6Patch availableCNA
SplunkSplunk Cloud- to before 9.0.22059.0.2205Patch availableCNA
  • Splunk Enterprise VendorSplunk Affected 8.2 to before 8.2.12; 9.0 to before 9.0.6 Fixed in 8.2.12, 9.0.6 Patch available CNA
  • Splunk Cloud VendorSplunk Affected - to before 9.0.2205 Fixed in 9.0.2205 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*8.2.0 to before 8.2.12; 9.0.0 to before 9.0.6VulnerableSplunk
cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*up to 9.0.2305.100VulnerableSplunk
  • cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* Versions 8.2.0 to before 8.2.12; 9.0.0 to before 9.0.6 Vulnerable ·Splunk
  • cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* Versions up to 9.0.2305.100 Vulnerable ·Splunk

Remediation

  • Fix · CNA Splunk Enterprise (Splunk) Fixed in 8.2.12, 9.0.6
  • Fix · CNA Splunk Cloud (Splunk) Fixed in 9.0.2205

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-40593
  2. 2026-10-03 Alias added: GHSA-qpqv-mwrg-mw8j

References

Advisory 2

  • TI-2026-16444 Unauthenticated Arbitrary File Creation and Truncation in a PostgreSQL Sidecar Service Endpoint in Splunk Enterprise KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-00154 The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly… KEVCVSS 3.1HIGH 7.5
  • TI-2023-24841 Remote code execution (RCE) in Splunk Enterprise through Insecure XML Parsing CVSS 3.1HIGH 8.8
  • TI-2023-15979 ‘edit_user’ Capability Privilege Escalation CVSS 3.1HIGH 8.8
  • TI-2024-30707 Remote Code Execution (RCE) due to insecure session storage configuration in Splunk Enterprise on Windows CVSS 3.1HIGH 8.8
  • TI-2022-21345 Reflected Cross-Site Scripting via the radio template in Splunk Enterprise CVSS 3.1HIGH 8.8
See all 297 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences