CVE-2026-76316

Received Received - Intake

SPL Injection in Splunk Enterprise

Publication date: 2026-08-19

Last updated on: 2026-08-19

Assigner: Cisco Systems, Inc.

Description

In Splunk Enterprise versions below 10.4.1, 10.2.5, 10.0.9, and 9.4.14, an unauthenticated user who can reach the Splunk management port could store a Search Processing Language (SPL) pipeline that runs when an administrator opens the Add Data forwarder workflow. The SPL pipeline could access all relevant data, affect system integrity, and affect availability of the Splunk platform instance. The SPL injection is possible because Deployment Server client identifiers are placed into dispatched searches without neutralizing special characters. Successful exploitation requires an administrator to open the affected Add Data forwarder workflow after the unauthenticated user registers a crafted Deployment Server client identity. For more information see Forward data (https://help.splunk.com/en/splunk-enterprise/get-started/get-data-in/10.2/how-to-get-data-into-your-splunk-deployment/forward-data) and About agent management (https://help.splunk.com/en/splunk-enterprise/administer/update-your-deployment/10.4/agent-management/about-agent-management) in the Splunk documentation.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-19

Last Modified

2026-08-19

Generated

2026-08-20

AI Q&A

2026-08-20

EPSS Evaluated

N/A

NVD

CVE-2026-76316

EUVD

EUVD-2026-63123

Affected Vendors & Products

Vendor	Product	Version / Range
splunk	splunk_enterprise	9.4.14
splunk	splunk_enterprise	10.0.9
splunk	splunk_enterprise	10.2.5
splunk	splunk_enterprise	From 10.4.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-943	The product generates a query intended to access or manipulate data in a data store such as a database, but it does not neutralize or incorrectly neutralizes special elements that can modify the intended logic of the query.

Attack-Flow Graph

Executive Summary

This vulnerability affects Splunk Enterprise versions below 10.4.1, 10.2.5, 10.0.9, and 9.4.14. An unauthenticated user can exploit it by registering a crafted Deployment Server client identity. When an administrator opens the Add Data forwarder workflow, the malicious SPL pipeline runs, allowing access to all data, system integrity compromise, and availability disruption.

Impact Analysis

An attacker could access sensitive data, modify system configurations, or disrupt Splunk services. This requires an administrator to open the Add Data workflow after the attacker registers a malicious client identity.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR and HIPAA requirements for data protection and integrity. Compliance may be compromised if sensitive data is exposed or altered.

Mitigation Strategies

Upgrade Splunk Enterprise to version 10.4.1, 10.2.5, 10.0.9, or 9.4.14 or later to address the SPL injection vulnerability.

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