CVE-2026-33865

Description

MLflow is vulnerable to Stored Cross-Site Scripting (XSS) caused by unsafe parsing of YAML-based MLmodel artifacts in its web interface. An authenticated attacker can upload a malicious MLmodel file containing a payload that executes when another user views the artifact in the UI. This allows actions such as session hijacking or performing operations on behalf of the victim. This issue affects MLflow version through 3.10.1

Predictions

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No vendor mitigations ingested yet for this CVE. The mitigation-content worker queues fetches as references arrive — check back in a few minutes, or see the references list below.

References

• https://nvd.nist.gov/vuln/detail/CVE-2026-33865
• https://github.com/mlflow/mlflow/pull/21435
• https://github.com/mlflow/mlflow/commit/aca4dd0ec88a12f7655155c224371280e9b45dda
• https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectors
• https://cert.pl/en/posts/2026/04/CVE-2026-33865
• https://github.com/mlflow/mlflow
• https://cert.pl/en/posts/2026/04/CVE-2026-33865/