{"id":"CVE-2026-115886","revision":null,"records":[{"revision":"1a2d4a1b53f94c149e0f614903b3ef6a","observedAt":"2026-10-23T22:48:20.692+00:00","statement":{"source":"cve-program","id":"CVE-2026-115886","aliases":[],"title":"MLflow: SSRF on unauthenticated MLflow servers via third-party scorer kwargs in the scorer invoke, register, and GenAI evaluate endpoints","description":"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.","state":0,"publishedAt":"2026-10-23T21:17:21.462+00:00","modifiedAt":"2026-10-23T21:17:21.462+00:00","affected":[{"ecosystem":"Vendor product","name":"mlflow","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"mlflow\",\n                    \"product\": \"mlflow\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 3.12.0rc0, < 3.17.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/mlflow/mlflow/security/advisories/GHSA-2wqp-q3c6-ccj5","https://github.com/mlflow/mlflow/pull/25890","https://github.com/mlflow/mlflow/commit/bac30b4148c4f40045b4d4db07ae60ab3838803f","https://github.com/mlflow/mlflow/releases/tag/v3.17.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115886","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-115886","identifiers":["CVE-2026-115886"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-10-26T15:37:14.6597162+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-26T15:37:14.6597162+00:00","lastSuccessAt":"2026-10-26T15:37:14.8367292+00:00","error":null,"lastVerifiedAt":"2026-10-26T15:37:14.8367325+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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