What’s Vulnerable › Vulnerabilities

CVE-2023-40594: Denial of Service (DoS) via the ‘printf’ Search Function

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-08-30 · updated 2026-06-17
• Weakness: CWE-400

Description

In Splunk Enterprise versions lower than 8.2.12, 9.0.6, and 9.1.1, an attacker can use the `printf` SPL function to perform a denial of service (DoS) against the Splunk Enterprise instance.

Affected products

• Splunk Enterprise: from 8.2.0 before 8.2.12; from 9.0.0 before 9.0.6; 9.1.0 — fixed in 8.2.12, 9.0.6
• Splunk Cloud Platform: through 9.0.2305.100

How to fix

Upgrade to a fixed version: Splunk Enterprise 8.2.12, 9.0.6. Check the vendor advisory for mitigations.

References

• https://advisory.splunk.com/advisories/SVD-2023-0803
• https://research.splunk.com/application/78b48d08-075c-4eac-bd07-e364c3780867/
• https://advisory.splunk.com/advisories/SVD-2023-0803
• https://research.splunk.com/application/78b48d08-075c-4eac-bd07-e364c3780867/

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