CVE-2025-8406: ZenML version 0.83.1 is affected by a path traversal vulnerability in the `PathMaterializer` class

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HIGH 7.8UPGRADE

CVE-2025-8406 is a high-severity flaw (CVSS 7.8) affecting zenml. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ZenML version 0.83.1 is affected by a path traversal vulnerability in the `PathMaterializer` class. The `load` function uses `is_path_within_directory` to validate files during `data.tar.gz` extraction, which fails to effectively detect symbolic and hard links. This vulnerability can lead to arbitrary file writes, potentially resulting in arbitrary command execution if critical files are overwritten.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-22
Published	2025-10-05
Last modified	2026-10-19

Publisher (CNA): huntr.dev · Vendor: zenml

Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-10-05 09:15 UTCPublished CVE record published
2026-10-19 16:10 UTCUpdated Record last modified

zenml zenml UPGRADE

Affected: >= 0.83.1 and < 0.84.2

Fixed in: 0.84.2

Safe to downgrade to: a release before 0.83.1

1. Check installed version

apt-cache policy zenml || rpm -q zenml || zenml --version

2. UPGRADE to 0.84.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade zenml

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zenml

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 0.83.1 (Debian / Ubuntu)

apt-cache madison zenml sudo apt install zenml=<VERSION_BEFORE_0.83.1> sudo apt-mark hold zenml

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

dnf --showduplicates list zenml sudo dnf downgrade zenml-<VERSION_BEFORE_0.83.1> sudo dnf versionlock add zenml

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-2025-8406?

zenml: upgrade to 0.84.2. Exact commands for each OS are on this page.

Is CVE-2025-8406 being exploited?

CVE-2025-8406 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-2025-8406 affect?

CVE-2025-8406 affects zenml. Severity is high (CVSS 7.8). ZenML version 0.83.1 is affected by a path traversal vulnerability in the `PathMaterializer` class. The `load` function uses `is_path_within_directory` to validate files during `data.tar.gz` extraction, which fails to effectively detect sym

How urgent is CVE-2025-8406?

Priority 40/100. High severity; Public exploit reference

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References

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