CVE-2026-115886

MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. From 3.12.0rc0 until 3.17.0, the scorer invoke, register, and GenAI evaluate endpoints, including unauthenticated POST /ajax-api/3.0/mlflow/scorer/invoke, accept serialized third-party scorer data that Scorer.model_validate_json resolves using a module-path allowlist without constraining the selected class or its constructor arguments. When optional trulens and trulens-providers-litellm packages are installed, an attacker can select mlflow.genai.scorers.trulens, choose a model URI outside MLflow's native provider registry so execution uses the LiteLLM fallback, and supply api_base and api_key values that cause the server to send an outbound request to an attacker-chosen or internal host with attacker-controlled headers and body. The vulnerable deserialization occurs before a tracking-store lookup or job submission. This issue is fixed in version 3.17.0.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/mlflow/mlflow/commit/bac30b4148c4f40045b4d4db07ae60ab3838803f
https://github.com/mlflow/mlflow/pull/25890
https://github.com/mlflow/mlflow/releases/tag/v3.17.0
https://github.com/mlflow/mlflow/security/advisories/GHSA-2wqp-q3c6-ccj5
https://github.com/mlflow/mlflow/security/advisories/GHSA-2wqp-q3c6-ccj5

Configurations

No configuration.

History

29 Oct 2026, 19:17

Type	Values Removed	Values Added
References	~~() https://github.com/mlflow/mlflow/security/advisories/GHSA-2wqp-q3c6-ccj5 -~~	() https://github.com/mlflow/mlflow/security/advisories/GHSA-2wqp-q3c6-ccj5 -

23 Oct 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-23 22:16

Updated : 2026-10-29 19:17

NVD link : CVE-2026-115886

Mitre link : CVE-2026-115886

CVE.ORG link : CVE-2026-115886

JSON object : View

Products Affected

No product.

CWE

CWE-470

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

CWE-918

Server-Side Request Forgery (SSRF)

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