CVE-2023-40593

Name: CVE-2023-40593
Creator: NVD / NIST
Published: 2023-08-30T17:15:09.853+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.49%

Last modified Jun 17, 2026

CVE-2023-40593 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.49% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.49%

38.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Splunk	Splunk	>= 8.2.0, < 8.2.12
Splunk	Splunk	>= 9.0.0, < 9.0.6
Splunk	Splunk Cloud Platform	<= 9.0.2305.100

References

https://advisory.splunk.com/advisories/SVD-2023-0802Vendor Advisory
https://research.splunk.com/application/8e8a86d5-f323-4567-95be-8e817e2baee6/Vendor Advisory
https://advisory.splunk.com/advisories/SVD-2023-0802Vendor Advisory
https://research.splunk.com/application/8e8a86d5-f323-4567-95be-8e817e2baee6/Vendor Advisory

Timeline

Published: Aug 30, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-40593?

How severe is CVE-2023-40593?

CVE-2023-40593 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.49% probability of exploitation in the next 30 days.

How do I fix CVE-2023-40593?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-40593?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST