Splunk AI Toolkit up to 5.x Model Codec deserialization

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.86+

Summaryinfo

A vulnerability was found in Splunk AI Toolkit up to 5.x. It has been classified as critical. Affected by this issue is some unknown functionality of the component Model Codec. This manipulation causes deserialization. The identification of this vulnerability is CVE-2026-76395. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Splunk AI Toolkit up to 5.x. It has been declared as critical. Affected by this vulnerability is an unknown code block of the component Model Codec. The manipulation with an unknown input leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In Splunk AI Toolkit versions below 6.0.0, a user who holds the "power" Splunk role could execute arbitrary code on the Splunk server by loading a model file containing crafted sparse matrix data. The deserialization of untrusted data is possible because a model codec in Splunk AI Toolkit deserializes sparse matrix data without guarding against embedded pickle content. For more information see Troubleshoot the Splunk Machine Learning Toolkit (https://help.splunk.com/en/splunk-cloud-platform/apply-machine-learning/machine-learning-toolkit-user-guide/5.5.0/troubleshooting-mltk/troubleshoot-the-splunk-machine-learning-toolkit) in the Splunk documentation.

It is possible to read the advisory at advisory.splunk.com. This vulnerability is known as CVE-2026-76395 since 08/19/2026. The exploitation appears to be easy. The attack can be launched remotely. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 6.0.0 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector (cisco): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: AI Toolkit 6.0.0

Timelineinfo

08/19/2026 CVE reserved
08/19/2026 +0 days VulDB entry created
08/20/2026 +0 days Advisory disclosed
08/20/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: advisory.splunk.com
Status: Confirmed

CVE: CVE-2026-76395 (🔒)
GCVE (CVE): GCVE-0-2026-76395
GCVE (VulDB): GCVE-100-393559

Entryinfo

Created: 08/20/2026 00:26
Changes: 08/20/2026 00:26 (64)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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