Splunk Enterprise and Cloud Platform
CVE-2023-40593: Denial of Service (DoS) in Splunk Enterprise Using a Malformed SAML Request
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.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Splunk Enterprise 8.2 | 8.2.12 or later |
| Splunk Enterprise 9.0 | 9.0.6 or later |
| Splunk Cloud - | 9.0.2205 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.