{"id":"CVE-2026-116692","published":"2026-10-27T21:18:05Z","modified":"2026-10-28T15:21:31Z","title":"MLflow is an open source AI engineering platform for agents, large language models, and machine learning models","vendor":"mlflow","product":"mlflow","tier":"core","eol":null,"description":{"text":"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, third-party scorer deserialization in mlflow/genai/scorers/base.py accepts request-selected descendants of THIRD_PARTY_SCORER_ALLOWED_MODULES rather than requiring an exact allowed module. A caller can use MLflow artifact endpoints to place a Python module beneath a writable allowed package and submit its module and class through /ajax-api/3.0/mlflow/scorer/invoke. Scorer.model_validate_json() imports the module and constructs the class before trace processing. Authentication-disabled deployments permit this code execution without credentials, while basic-auth deployments require a principal capable of creating an experiment and run and uploading artifacts. In either configuration, the allowed scorer package must be writable by the server process. This issue is fixed in version 3.17.0.","provenance":"source","from":"NVD"},"summary":null,"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.00704,"percentile":0.53293,"date":"2026-10-30","provenance":"source"},"kev":null,"vulncheckKev":null,"exploited":false,"otx":{"pulseCount":3,"pulses":[{"name":"Known_Cve | Oct 31, 2026 | Part 2/3","url":"https://otx.alienvault.com/pulse/6ae4af06a3790b65a9afe87a","created":"2026-10-30"},{"name":"Known_Cve | Oct 30, 2026 | Part 2/2","url":"https://otx.alienvault.com/pulse/6ae35d945cba1d70e2bf3a79","created":"2026-10-29"},{"name":"Known_Cve | Oct 29, 2026 | Part 3/3","url":"https://otx.alienvault.com/pulse/6ae20c338ef6b2d900217a8b","created":"2026-10-28"}],"provenance":"machine"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"},{"id":"CWE-470","name":"Use of Externally-Controlled Input to Select Classes or Code"}],"references":[{"url":"https://github.com/mlflow/mlflow/commit/a732443e695c3c677680c54320efc394c81654ab","tags":[]},{"url":"https://github.com/mlflow/mlflow/pull/25906","tags":[]},{"url":"https://github.com/mlflow/mlflow/releases/tag/v3.17.0","tags":[]},{"url":"https://github.com/mlflow/mlflow/security/advisories/GHSA-26p8-2jq9-3vq9","tags":[]}],"techniques":[],"reports":[],"affected":[{"ecosystem":"PyPI","package":"mlflow","vulnerableRanges":[">=3.12.0rc0, <3.17.0"],"patched":["3.17.0"],"from":["GHSA-26p8-2jq9-3vq9"],"provenance":"source"}],"advisories":[{"id":"GHSA-26p8-2jq9-3vq9","url":"https://github.com/advisories/GHSA-26p8-2jq9-3vq9","severity":"CRITICAL","ecosystem":"PyPI","package":"mlflow","vulnerableRanges":[">=3.12.0rc0, <3.17.0"],"patched":["3.17.0"],"provenance":"source","from":"GHSA"}],"euvd":{"id":"EUVD-2026-111383","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-111383","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2026-10-28","earliestUrl":"https://github.com/foxcornlab/mlflow-scorer-scanner","repos":[{"name":"foxcornlab/mlflow-scorer-scanner","url":"https://github.com/foxcornlab/mlflow-scorer-scanner","stars":0,"created":"2026-10-28"}]},"first":{"date":"2026-10-28","source":"PoC-in-GitHub","url":"https://github.com/foxcornlab/mlflow-scorer-scanner"},"provenance":"source"},"exploitRefs":[],"flow":[],"timeline":[{"date":"2026-10-27","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116692","provenance":"source"},{"date":"2026-10-28","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/foxcornlab/mlflow-scorer-scanner","provenance":"source"}],"speed":{"daysToPublicExploit":1,"firstExploitFrom":"PoC-in-GitHub","daysToKev":null},"priority":{"score":23.9,"factors":[{"name":"In a KEV catalog","points":0.0,"detail":"not listed"},{"name":"Recent KEV listing","points":0.0,"detail":"not listed"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":10.66,"detail":"percentile 0.5329"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 PoC-in-GitHub repo"},{"name":"Mentioned in OTX pulses","points":1.37,"detail":"3 pulses"},{"name":"CVSS severity","points":6.86,"detail":"base score 9.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}