{"id":"CVE-2026-115886","published":"2026-10-23T22:16:58Z","modified":"2026-10-29T19:17:16Z","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, 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.","provenance":"source","from":"NVD"},"summary":null,"cvss":{"score":6.5,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","provenance":"source","from":"NVD"},"epss":{"score":0.00676,"percentile":0.52212,"date":"2026-10-30","provenance":"source"},"kev":null,"vulncheckKev":{"dateAdded":"2026-10-29","exploitedFirstSeen":"2026-10-29","ransomware":false,"evidence":[{"url":"https://previdian.com/CVE-2026-115886","date":"2026-10-29"}],"evidenceTotal":1,"provenance":"source"},"exploited":true,"otx":{"pulseCount":5,"pulses":[{"name":"Known_Cve | Oct 31, 2026 | Part 1/3","url":"https://otx.alienvault.com/pulse/6ae4af0017a739f65534f550","created":"2026-10-30"},{"name":"Known_Cve | Oct 30, 2026 | Part 1/2","url":"https://otx.alienvault.com/pulse/6ae35d8e6ee9e838fd042498","created":"2026-10-29"},{"name":"Known_Cve | Oct 29, 2026 | Part 2/3","url":"https://otx.alienvault.com/pulse/6ae20c290cecfbc79bd84822","created":"2026-10-28"},{"name":"Known_Cve | Oct 28, 2026 | Part 2/3","url":"https://otx.alienvault.com/pulse/6ae0ba8e2d29f6aa1bfe6f11","created":"2026-10-27"},{"name":"Known_Cve | Oct 27, 2026 | Part 3/3","url":"https://otx.alienvault.com/pulse/6adf68ca1522e5424ef6b0c7","created":"2026-10-26"}],"provenance":"machine"},"cwes":[{"id":"CWE-470","name":"Use of Externally-Controlled Input to Select Classes or Code"},{"id":"CWE-918","name":"Server-Side Request Forgery"}],"references":[{"url":"https://github.com/mlflow/mlflow/commit/bac30b4148c4f40045b4d4db07ae60ab3838803f","tags":[]},{"url":"https://github.com/mlflow/mlflow/pull/25890","tags":[]},{"url":"https://github.com/mlflow/mlflow/releases/tag/v3.17.0","tags":[]},{"url":"https://github.com/mlflow/mlflow/security/advisories/GHSA-2wqp-q3c6-ccj5","tags":[]},{"url":"https://github.com/mlflow/mlflow/security/advisories/GHSA-2wqp-q3c6-ccj5","tags":[]}],"techniques":[],"reports":[],"affected":[{"ecosystem":"PyPI","package":"mlflow","vulnerableRanges":[">=3.12.0rc0, <3.17.0"],"patched":["3.17.0"],"from":["GHSA-2wqp-q3c6-ccj5"],"provenance":"source"}],"advisories":[{"id":"GHSA-2wqp-q3c6-ccj5","url":"https://github.com/advisories/GHSA-2wqp-q3c6-ccj5","severity":"MODERATE","ecosystem":"PyPI","package":"mlflow","vulnerableRanges":[">=3.12.0rc0, <3.17.0"],"patched":["3.17.0"],"provenance":"source","from":"GHSA"}],"euvd":{"id":"EUVD-2026-109184","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-109184","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":{"nuclei":[{"id":"CVE-2026-115886","name":"MLflow <3.17.0 - Unauthenticated SSRF via Third-Party (TruLens) Scorer","severity":"medium","path":"http/cves/2026/CVE-2026-115886.yaml","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-115886.yaml"}],"provenance":"source"},"exploitRefs":[],"flow":[],"timeline":[{"date":"2026-10-23","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115886","provenance":"source"},{"date":"2026-10-29","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://previdian.com/CVE-2026-115886","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":null},"priority":{"score":66.8,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in VulnCheck KEV"},{"name":"Recent KEV listing","points":10.0,"detail":"added 2 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":10.44,"detail":"percentile 0.5221"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 nuclei template"},{"name":"Mentioned in OTX pulses","points":1.77,"detail":"5 pulses"},{"name":"CVSS severity","points":4.55,"detail":"base score 6.5"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}