Splunk Enterprise and Cloud Platform
CVE-2023-40595: Remote Code Execution via Serialized Session Payload
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.
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityHIGHCVSS 3.1 8.8
EPSS0.90%Chance of exploitation in 30 days
Public exploitNot tracked
FixAvailable
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 Enterprise 9.1 | 9.1.1 or later |
| Splunk Cloud - | 9.0.2305.200 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.