CVE-2026-33865: lfprojects mlflow Cross-site Scripting
Vulnerability summary
CVE-2026-33865 is a medium (CVSS 5.4) Cross-site Scripting vulnerability in lfprojects mlflow. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 21.3% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 0 · Related 1Timeline
- 07-04-2026PublishedVulnerability first disclosed.
- 14-04-2026Last modifiedVulnerability information updated.
Description
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 metrics
6 scores · 5 sources · 2 versions- OSV · WolfiEcosystem advisory · calculated5.1MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
- OSV · ChainguardEcosystem advisory · calculated5.1MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
- NVDNIST5.1MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- OSV · PypiEcosystem advisory · calculated5.4MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
EPSS trend
Probability
0.30%
Chance of exploitation in the next 30 days
Percentile
21%
Versus all other CVEs
30-day change
+0.08 pp
From 0.22% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (afine.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Chainguard2 products
- mlflow< 3.16.0-r0 | < 3.11.1-r0
- mlflow-fips< 3.11.1-r0
Lfprojects1 product
- mlflow≤ 3.10.1
Mlflow1 product
- mlflow≤ 3.10.1
PyPI1 product
- mlflow< 3.11.1 | < 3.11.0rc0
Wolfi1 product
- mlflow< 3.16.0-r0 | < 3.11.1-r0
5 vendors · 6 products
References
12 links- afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectorsExploitTechnical DescriptionWEBEVIDENCEThird Party Advisory
- github.com/mlflow/mlflowPACKAGE
- github.comWEB