Vulnerability · Published Jun 28, 2026 · Assigned by VulDB

CVE-2026-13484MLflow Experiment-scoped Label Schema CRUD API authorization

Medium 5.0

In plain English

A medium-severity missing authorization in MLflow. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).

Severity (CVSS 3.1)5.0Medium

Exploit odds (30 days)0.5%top 56.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability has been found in MLflow up to 4666cffc7912ea606d592fc38d6a75e2935f65e7. The impacted element is an unknown function of the component Experiment-scoped Label Schema CRUD API. Such manipulation leads to missing authorization. It is possible to launch the attack remotely. A high complexity level is associated with this attack. The exploitability is regarded as difficult. The exploit has been disclosed to the public and may be used. A reply to the GitHub issue explains, that "[t]he labeling schema PR has not been merged yet. The auth handlers will be added before the release."

Affected products (as reported)

Vendor	Product	Versions
n/a	MLflow	4666cffc7912ea606d592fc38d6a75e2935f65e7

Weakness: CWE-862, CWE-863 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C

References

VDB-374481 | MLflow Experiment-scoped Label Schema CRUD API authorization vdb-entry
VDB-374481 | CTI Indicators (IOB, IOC) signature, permissions-required
CVE-2026-13484 | CVE Analysis and Report third-party-advisory
Submit #837658 | MLflow Unreleased development code in pull request #23607, commit 4666cffc7912ea606d592fc38d6a75e2935f65e7. No released MLflow version CWE-862 Missing Authorization third-party-advisory
https://github.com/mlflow/mlflow/issues/23608 exploit, issue-tracking
https://github.com/mlflow/mlflow/issues/23608#issuecomment-4560963877 issue-tracking
https://github.com/mlflow/mlflow/ product