CVE-2026-3840: A vulnerability in Kedro version 1.2.0 allows an attacker to exploit path traversal by providing a crafted ver

Q: How do I fix CVE-2026-3840?

kedro: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2026-3840 being exploited?

CVE-2026-3840 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-3840 affect?

CVE-2026-3840 affects kedro. Severity is high (CVSS 7.1). A vulnerability in Kedro version 1.2.0 allows an attacker to exploit path traversal by providing a crafted version string. The `_get_versioned_path()` method in `kedro/io/core.py` directly interpolates user-supplied version strings into fil

Q: How urgent is CVE-2026-3840?

Priority 37/100. High severity; Public exploit reference; On your watchlist

Routine

HIGH 7.1WATCHLISTDOWNGRADE

CVE-2026-3840 is a high-severity flaw (CVSS 7.1) affecting kedro. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in Kedro version 1.2.0 allows an attacker to exploit path traversal by providing a crafted version string. The `_get_versioned_path()` method in `kedro/io/core.py` directly interpolates user-supplied version strings into filesystem paths without sanitization. This enables an attacker to escape the intended versioned dataset directory and access files outside the expected path. The issue is also reachable through the CLI via the `-

Why this priority

High severity
Public exploit reference
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.1 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-06-12
Last modified	2026-10-26

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

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-12 17:16 UTCPublished CVE record published
2026-10-26 11:10 UTCUpdated Record last modified

linuxfoundation kedro DOWNGRADE

Affected: 1.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.0

1. Check installed version

pip show kedro

2. No fixed release: DOWNGRADE to a release before 1.2.0

pip index versions kedro pip install "kedro<1.2.0"

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-2026-3840?

kedro: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-3840 being exploited?

CVE-2026-3840 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-2026-3840 affect?

CVE-2026-3840 affects kedro. Severity is high (CVSS 7.1). A vulnerability in Kedro version 1.2.0 allows an attacker to exploit path traversal by providing a crafted version string. The `_get_versioned_path()` method in `kedro/io/core.py` directly interpolates user-supplied version strings into fil

How urgent is CVE-2026-3840?

Priority 37/100. High severity; Public exploit reference; On your watchlist

Related CVEs

CVE-2026-35167 HIGH 7.1 UPGRADE Kedro is a toolbox for production-ready data science

References

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