# CVE-2026-76395: Deserialization in Splunk AI Toolkit

> A user with the power role can execute arbitrary code on the Splunk server by uploading a crafted model file with malicious pickle data.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Aug 2026
- **Updated:** 26 Aug 2026
- **Also known as:** GHSA-wmwx-pqh3-xv86

## What is CVE-2026-76395?

CVE-2026-76395 is a high-severity unsafe deserialization vulnerability in Splunk AI Toolkit, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

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.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2026-76395?

It affects 1 product.


Products: Splunk Ai Toolkit.

## How do I fix CVE-2026-76395?

No fix has been published for CVE-2026-76395 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-76395 being exploited?

There is no known exploitation of CVE-2026-76395 in the wild and no public exploit code.

## Other vulnerabilities in Splunk AI Toolkit

- [CVE-2026-20266](https://insights.sbomify.com/CVE-2026-20266/): OS Command Injection in the btool Configuration Helper in Splunk AI Toolkit (critical 9.1)
- [CVE-2026-76391](https://insights.sbomify.com/CVE-2026-76391/): Improper Privilege Management through Agent Run History in Splunk AI Toolkit (high 8.3)
- [CVE-2026-76394](https://insights.sbomify.com/CVE-2026-76394/): Missing Authorization in Container and Connection Management through the REST API in Splunk AI Toolkit (high 8.3)
- [CVE-2026-76397](https://insights.sbomify.com/CVE-2026-76397/): Improper Access Control in Experiment History through the REST API in Splunk AI Toolkit (high 8.1)
- [CVE-2026-76399](https://insights.sbomify.com/CVE-2026-76399/): Incorrect Permission Assignment for Scheduled Searches in Splunk AI Toolkit (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-76395 and fix it if it is affected.

What it is: CVE-2026-76395 is a high-severity unsafe deserialization vulnerability in Splunk AI Toolkit, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-76395 in the wild and no public exploit code.

Affected product: Splunk AI Toolkit. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-76395/ (Markdown: https://insights.sbomify.com/CVE-2026-76395/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76395
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76395
- OSV: https://osv.dev/vulnerability/CVE-2026-76395

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-76395/
Summaries are generated and may contain mistakes; the official description above is the record.