{"schemaVersion":3,"id":"CVE-2026-2734","aliases":["GHSA-w5xq-c4pf-ghq7","BIT-mlflow-2026-2734","PYSEC-2026-2660"],"status":"published","duplicateOf":null,"title":null,"description":"In mlflow/mlflow versions up to 3.9.0, the `SearchModelVersions` REST API endpoint and the `mlflowSearchModelVersions` GraphQL query lack proper per-model authorization checks when basic authentication is enabled. This allows any authenticated user to enumerate all model versions across all registered models, regardless of their permission level. The issue arises due to the absence of `SearchModelVersions` in the `BEFORE_REQUEST_VALIDATORS` and `AFTER_REQUEST_HANDLERS` for the REST API, and its omission from `GraphQLAuthorizationMiddleware.PROTECTED_FIELDS` for GraphQL. This vulnerability can expose sensitive information such as model names, version descriptions, source URIs, tags, and other metadata, potentially revealing proprietary or confidential details in multi-tenant environments. The issue is resolved in version 3.10.0.","dates":{"published":"2026-05-21T03:49:38.297Z","modified":"2026-05-21T12:40:09.114Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.0","versionLabel":"v3.0","source":"CVE.org","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"CVE.org","score":6.5,"severity":"medium","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Pypi","score":6.5,"severity":"medium","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":7.2,"impact":6,"computed":true},{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00502,"percentile":0.41769,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.061000000000000026,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00441},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00502,"percentile":0.41769}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00441,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00502,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00502,"percentile":0.41769}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"REF_CFCD39050E23BBDC","name":"Exploit Reference (huntr.com)","source":"reference","url":"https://huntr.com/bounties/d632f783-b2c7-4a3b-af5e-1d693e841c08","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-284","name":"Improper Access Control","description":"The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.","type":"weakness","status":"Incomplete","abstraction":"Pillar","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/284.html"}],"affected":[{"vendor":"lfprojects","product":"mlflow","name":"mlflow","label":"mlflow","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 3.10.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.10.0","eol":null,"hubHref":"/vendor/lfprojects/mlflow"},{"vendor":"mlflow","product":"mlflow/mlflow","name":"mlflow/mlflow","label":"mlflow/mlflow","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ unspecified, < 3.10.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ unspecified, < 3.10.0","eol":null,"hubHref":"/vendor/mlflow/mlflowmlflow"},{"vendor":"PyPI","product":"mlflow","name":"mlflow","label":"mlflow","ecosystem":"PyPI","cpePart":null,"purl":"pkg:pypi/mlflow","purlType":"pypi","versions":[{"text":"< 3.10.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.10.0","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://huntr.com/bounties/d632f783-b2c7-4a3b-af5e-1d693e841c08","label":"huntr.com/bounties/d632f783-b2c7-4a3b-af5e-1d693e841c08","hostname":"huntr.com","tags":["WEB","Exploit","Third Party Advisory"]},{"url":"https://github.com/mlflow/mlflow/commit/6989066af33fdcb03588fd71a1a67f8fc5ef12c9","label":"github.com/mlflow/mlflow/commit/6989066af33fdcb03588fd71a1a67f8fc5ef12c9","hostname":"github.com","tags":["WEB","Patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2734","label":"nvd.nist.gov/vuln/detail/CVE-2026-2734","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/mlflow/mlflow","label":"github.com/mlflow/mlflow","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://pypi.org/project/mlflow","label":"pypi.org/project/mlflow","hostname":"pypi.org","tags":["PACKAGE"]},{"url":"https://github.com/advisories/GHSA-w5xq-c4pf-ghq7","label":"github.com/advisories/GHSA-w5xq-c4pf-ghq7","hostname":"github.com","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-05-21T03:49:38.297Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-05-21T12:40:09.114Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":36,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T03:22:40.004Z","stale":false,"partial":false}}