CVE-2026-2635
MLflow Use of Default Password Authentication Bypass Vulnerability
Description
MLflow Use of Default Password Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of MLflow. Authentication is not required to exploit this vulnerability. The specific flaw exists within the basic_auth.ini file. The file contains hard-coded default credentials. An attacker can leverage this vulnerability to bypass authentication and execute arbitrary code in the context of the administrator. Was ZDI-CAN-28256.
INFO
Published Date :
Feb. 20, 2026, 11:16 p.m.
Last Modified :
Feb. 23, 2026, 6:13 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.0 | CRITICAL | 99f1926a-a320-47d8-bbb5-42feb611262e | ||||
| CVSS 3.0 | CRITICAL | [email protected] |
Solution
- Update the basic_auth.ini file with strong, unique credentials.
- Ensure MLflow is configured with secure authentication settings.
- Remove or disable any default credential configurations.
Public PoC/Exploit Available at Github
CVE-2026-2635 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-2635.
| URL | Resource |
|---|---|
| https://github.com/mlflow/mlflow/pull/19260 | |
| https://www.zerodayinitiative.com/advisories/ZDI-26-111/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-2635 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-2635
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Proof-of-concept exploits and reproduction labs for CVEs analyzed by the Exploit Intelligence Platform
Shell Python PHP Ruby JavaScript TypeScript
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-2635 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-2635 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Feb. 20, 2026
Action Type Old Value New Value Added Description MLflow Use of Default Password Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of MLflow. Authentication is not required to exploit this vulnerability. The specific flaw exists within the basic_auth.ini file. The file contains hard-coded default credentials. An attacker can leverage this vulnerability to bypass authentication and execute arbitrary code in the context of the administrator. Was ZDI-CAN-28256. Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-1393 Added Reference https://github.com/mlflow/mlflow/pull/19260 Added Reference https://www.zerodayinitiative.com/advisories/ZDI-26-111/