CVE-2026-33865Stored XSS via unsafe YAML parsing in MLflow
Updated under an hour ago ()
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It affects Mlflow and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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MLflow is vulnerable to Stored Cross-Site Scripting (XSS) caused by unsafe parsing of YAML-based MLmodel artifacts in its web interface. An authenticated attacker can upload a malicious MLmodel file containing a payload that executes when another user views the artifact in the UI. This allows actions such as session hijacking or performing operations on behalf of the victim. This issue affects MLflow version through 3.10.1
- CVSS
- 5.1 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- CERT-PL
- NVD analysis
- Analyzed
- Record last updated
- Apr 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Mlflow Mlflow mlflow:mlflow (from the name) | through 3.10.1 | CNA record |
lfprojects mlflow lfprojects:mlflow | through 3.10.1 | NVD |
References
- https://github.com/mlflow/mlflow/pull/21435patch, issue-tracking
- https://cert.pl/en/posts/2026/04/CVE-2026-33865/third-party-advisory
- https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectorsexploit, technical-description, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.