{"answers":{"affected":"4 open source packages ship an affected version, including mlflow. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2734 exists.","fix":"Upgrade mlflow to 3.10.0 or later.","what":"CVE-2026-2734 is a medium-severity missing authorization vulnerability in Lfprojects Mlflow, published on 21 May 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-2734 and fix it if it is affected.\n\nWhat it is: CVE-2026-2734 is a medium-severity missing authorization vulnerability in Lfprojects Mlflow, published on 21 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2734 exists.\n\nAffected packages and fixed versions:\n- mlflow (Bitnami): affected all versions; fixed in 3.10.0\n- mlflow (PyPI): affected all versions; fixed in 3.10.0\n- mlflow (PyPI): affected all versions; fixed in 3.10.0\n- mlflow (PyPI): affected all versions; fixed in 3.10.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-2734/ (Markdown: https://insights.sbomify.com/CVE-2026-2734/index.md)","id":"CVE-2026-2734","markdown":"https://insights.sbomify.com/CVE-2026-2734/index.md","name":"CVE-2026-2734","record":{"aliases":["BIT-mlflow-2026-2734","CLSA-2026-1791447254","GHSA-w5xq-c4pf-ghq7","PYSEC-2026-2660"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":true,"product_category":"MLflow server","requires_auth":"low_privilege","summary":"Authenticated users can bypass per-model authorization to enumerate all model versions and metadata in MLflow when basic authentication is enabled.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"@huntr_ai","cpe":[{"product":"mlflow","vendor":"lfprojects"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.0"},"cwes":[{"id":"CWE-284","name":"Improper Access Control"}],"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.","ecosystems":["Bitnami","PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Authorization Bypass in SearchModelVersions in mlflow/mlflow","id":"CVE-2026-2734","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"lfprojects:mlflow","products":["lfprojects:mlflow"],"type":"missing_authorization","year":"2026"},"n_packages":4,"n_references":2,"next":{"headline":"Stored Cross-Site Scripting (XSS) vulnerability in Alkacon's OpenCms","id":"CVE-2026-2735"},"packages":[{"ecosystem":"Bitnami","fixed":["3.10.0"],"introduced":["0"],"last_affected":[],"package":"mlflow","purl":"pkg:bitnami/mlflow","source":"BIT-mlflow-2026-2734"},{"ecosystem":"PyPI","fixed":["3.10.0"],"introduced":["0"],"last_affected":[],"package":"mlflow","purl":null,"source":"GHSA-w5xq-c4pf-ghq7"},{"ecosystem":"PyPI","fixed":["3.10.0"],"introduced":["0"],"last_affected":[],"package":"mlflow","purl":"pkg:pypi/mlflow","source":"GHSA-w5xq-c4pf-ghq7"},{"ecosystem":"PyPI","fixed":["3.10.0"],"introduced":["0"],"last_affected":[],"package":"mlflow","purl":"pkg:pypi/mlflow","source":"PYSEC-2026-2660"}],"prev":{"headline":"Org.keycloak/keycloak-services: keycloak: missing check on disabled client for docker registry protocol","id":"CVE-2026-2733"},"products":["mlflow/mlflow"],"published":"2026-05-21","related":[{"cvss_score":9.3,"headline":"MLflow Server-Side Request Forgery","id":"CVE-2026-64849","kev_date_added":"2026-08-19","published":"2026-08-17"},{"cvss_score":10,"headline":"Command Injection in mlflow/mlflow","id":"CVE-2025-15379","kev_date_added":null,"published":"2026-03-30"},{"cvss_score":10,"headline":"Remote Code Execution due to Full Controlled File Write in mlflow/mlflow","id":"CVE-2024-0520","kev_date_added":null,"published":"2024-06-06"},{"cvss_score":10,"headline":"Path Traversal: '\\..\\filename'","id":"CVE-2023-6977","kev_date_added":null,"published":"2023-12-20"},{"cvss_score":10,"headline":"Improper Neutralization of Special Elements Used in a Template Engine in mlflow/mlflow","id":"CVE-2023-6709","kev_date_added":null,"published":"2023-12-12"},{"cvss_score":10,"headline":"MLflow Arbitrary File Upload","id":"CVE-2023-6015","kev_date_added":null,"published":"2023-11-16"},{"cvss_score":10,"headline":"MLflow Arbitrary File Write","id":"CVE-2023-6018","kev_date_added":null,"published":"2023-11-16"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-21","vendors":["mlflow"]},"summary":"Authenticated users can bypass per-model authorization to enumerate all model versions and metadata in MLflow when basic authentication is enabled.","url":"https://insights.sbomify.com/CVE-2026-2734/"}