Deserialization Vulnerability in MLflow Affects Multiple Versions
CVE-2026-115886

6.5MEDIUM

Key Information:

Vendor

Mlflow

Status
Mlflow
Vendor
CVE Published:
23 October 2026

What is CVE-2026-115886?

MLflow, an open-source AI engineering platform, is vulnerable due to a deserialization flaw in certain API endpoints that handles third-party scorer data. Specifically, versions from 3.12.0rc0 to 3.17.0 allow unauthenticated POST requests to invoke MLflow's scoring capabilities. An attacker can exploit this vulnerability by supplying malicious serialized data utilizing the optional trulens and trulens-providers-litellm packages, leading the server to execute requests with manipulated API parameters. This flaw enables an attacker to send requests to any chosen host, potentially resulting in unauthorized data exposure. The issue is resolved in version 3.17.0, emphasizing the importance of keeping software up to date.

Affected Version(s)

mlflow >= 3.12.0rc0, < 3.17.0

References

https://github.com/mlflow/mlflow/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/mlflow/mlflow/pull/25890
x_refsource_MISC
https://github.com/mlflow/mlflow/commit/bac30b4148c4f4004...
x_refsource_MISC

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.