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CVE-2023-40593

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

HIGH
7.5
CVSS Score
Published: August 30, 2023 at 04:19 PM UTC
Updated: June 17, 2026 at 06:18 AM UTC
2 products affected across 1 vendorSplunkSplunk Cloud Platform

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Severity
HIGH7.5
Exploit prediction
EPSS 0.6%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Splunk· Splunk
95%
v < 9.0.22058.2 ≤ v < 8.2.128.2.0 ≤ v < 8.2.129.0 ≤ v < 9.0.69.0.0 ≤ v < 9.0.68.29.0
Affected range stops below 8.2.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.0.2205, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.0.6, so it looks safe — our inference, not a vendor statement
Splunk Cloud Platform· Splunk
95%
v ≤ 9.0.2305.100

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

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

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400NVD-CWE-noinfo

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