CVE-2026-76393: In Splunk AI Toolkit versions below 6.0.0, a user who can upload models could overwrite a model being uploaded

Routine

MEDIUM 5.9UPGRADE

CVE-2026-76393 is a medium-severity flaw (CVSS 5.9) affecting ai toolkit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Splunk AI Toolkit versions below 6.0.0, a user who can upload models could overwrite a model being uploaded by another user by sending a concurrent upload request for the same model name, causing the resulting model lookup entry to reference attacker-controlled content. The race condition is possible because Splunk AI Toolkit does not verify that the uploaded content belongs to the request that creates the model lookup entry. For more informat

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-362
Published	2026-08-19
Last modified	2026-08-26

Publisher (CNA): Cisco Systems, Inc. · Vendor: splunk

Last updated 2026-08-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-19 22:17 UTCPublished CVE record published
2026-08-26 20:18 UTCUpdated Record last modified

splunk ai toolkit UPGRADE

Affected: >= 5.7.0 and < 6.0.0

Fixed in: 6.0.0

Safe to downgrade to: a release before 5.7.0

1. Check installed version

apt-cache policy ai-toolkit || rpm -q ai-toolkit || ai-toolkit --version

2. UPGRADE to 6.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ai-toolkit

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ai-toolkit

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 5.7.0 (Debian / Ubuntu)

apt-cache madison ai-toolkit sudo apt install ai-toolkit=<VERSION_BEFORE_5.7.0> sudo apt-mark hold ai-toolkit

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ai-toolkit sudo dnf downgrade ai-toolkit-<VERSION_BEFORE_5.7.0> sudo dnf versionlock add ai-toolkit

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-76393?

ai toolkit: upgrade to 6.0.0. Exact commands for each OS are on this page.

Is CVE-2026-76393 being exploited?

CVE-2026-76393 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-76393 affect?

CVE-2026-76393 affects ai toolkit. Severity is medium (CVSS 5.9). In Splunk AI Toolkit versions below 6.0.0, a user who can upload models could overwrite a model being uploaded by another user by sending a concurrent upload request for the same model name, causing the resulting model lookup entry to refer

How urgent is CVE-2026-76393?

Priority 23/100. No elevated risk signals yet.

Software pages

Splunk vulnerabilities

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References

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