{"items":[{"id":"NVI-00008877","kind":"vulnerability","title":"MLflow vulnerable to remote code execution on unauthenticated servers via third-party scorer deserialization importing caller-placed artifact modules","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-26p8-2jq9-3vq9","CVE-2026-116692"],"plain_summary":"GitHub lists this reviewed advisory for mlflow. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-008bc03192d0a83e4d65e3c2003d2bae"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-27T21:26:34.000Z","value":"9.8 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-159efc5100c300d1c3834bb69d05f923"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.704%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.53336. Missing scores are unknown.","source_id":"sr-008bc03192d0a83e4d65e3c2003d2bae"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-159efc5100c300d1c3834bb69d05f923","url":"https://github.com/advisories/GHSA-26p8-2jq9-3vq9","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-26p8-2jq9-3vq9","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:36.327Z"},{"id":"sr-008bc03192d0a83e4d65e3c2003d2bae","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-116692","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.374Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-159efc5100c300d1c3834bb69d05f923"],"technology":"mlflow","known_exclusions":[],"conditions_summary":"## Summary\n\nMLflow 3.12.0 introduced registration and deserialization support for third-party scorers in OSS MLflow. During scorer deserialization, the server accepts a request-controlled Python module path beneath one of four allowed package prefixes, imports that module, obtains a request-controlled class, and instantiates it synchronously.\n\nAn HTTP caller can combine this behavior with MLflow's built-in experiment, run, and artifact-upload endpoints:\n\n1. Create an experiment whose local artifact location points to a writable allowed scorer package.\n2. Create a run, causing MLflow to allocate `//artifacts/`.\n3. Upload a Python module into that run artifact directory.\n4. Submit a serialized third-party scorer whose module path resolves to the uploaded file.\n5. Trigger server-side import and class construction through `/ajax-api/3.0/mlflow/scorer/invoke`.\n\nOn the default no-auth server using the official MLflow v3.14.0 image, this produces unauthenticated arbitrary Python code execution with the privileges of the MLflow server process. The reproduced image runs the process as uid 0 and permits writes to its installed Python package tree.\n\nThe attached pro","public_affected_ranges":[">= 3.12.0rc0, < 3.17.0"]}],"null_published_at":"2026-10-31T22:13:44.211Z","source_updated_at":"2026-10-27T21:26:34.000Z","source_disclosed_at":"2026-10-27T21:26:32.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:56:36.327Z"}],"next_cursor":null,"snapshot_revision":"42594"}