CVE-2026-33866
Last modified
CVE-2026-33866 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint used to download saved model artifacts. Due to missing access‑control validation, a user without permissions to a given experiment can directly query this endpoint and retrieve model artifacts they are not authorized to access. This issue affects MLflow version through 3.10.1. EPSS estimates a 0.36% chance of exploitation in the next 30 days.
Description
MLflow is vulnerable to an authorization bypass affecting the AJAX endpoint used to download saved model artifacts. Due to missing access‑control validation, a user without permissions to a given experiment can directly query this endpoint and retrieve model artifacts they are not authorized to access. This issue affects MLflow version through 3.10.1
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/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
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Lfprojects | Mlflow | <= 3.10.1 |
References
- https://afine.com/blogs/attacking-mlflow-how-ml-artifacts-become-attack-vectorsExploit, Third Party Advisory
- https://cert.pl/en/posts/2026/04/CVE-2026-33865/Third Party Advisory
- https://github.com/mlflow/mlflow/pull/21708Issue Tracking, Patch
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-33866?
How severe is CVE-2026-33866?
How do I fix CVE-2026-33866?
How Strix Helps
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-33856Missing Release of Memory after Effective Lifetime vulnerabi…7.5
- CVE-2026-33857Out-of-bounds Read vulnerability in mod_proxy_ajp of Apach…5.3
- CVE-2026-33858Dag Authors, who normally should not be able to execute code…8.8
- CVE-2026-3386A flaw has been found in wren-lang wren up to 0.4.0. Affecte…7.1
- CVE-2026-33862A vulnerability has been identified in Teamcenter V2312 (All…6.1
- CVE-2026-33865MLflow is vulnerable to Stored Cross-Site Scripting (XSS) ca…5.4
- CVE-2026-33867WWBN AVideo is an open source video platform. In versions up…7.5
- CVE-2026-33868Mastodon is a free, open-source social network server based …6.1
- CVE-2026-33869Mastodon is a free, open-source social network server based …4.8
- CVE-2026-3387A vulnerability has been found in wren-lang wren up to 0.4.0…5.5
- CVE-2026-33870Netty is an asynchronous, event-driven network application f…7.5
- CVE-2026-33871Netty is an asynchronous, event-driven network application f…7.5
Are you affected by CVE-2026-33866?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST