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CVE-2026-2635

39
FAUCET Score

CVE-2026-2635 describes an authentication bypass vulnerability in MLflow, stemming from hard-coded default credentials in the basic_auth.ini file. This critical flaw (CVSS 9.8) allows unauthenticated remote attackers to execute arbitrary code with administrator privileges. While there are no known public exploits or active exploitation, the vulnerability has garnered significant community discussion, indicating potential future interest.

Impacted Technologies

VendorProductVersion(s)CPE
MLflowMLflow
3.4.0CNA affecteddefault unknown

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.97%
Probability of exploitation in next 30 days
EPSS Percentile
58.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0097 is in the 33rd percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

pippatch availablevia ghsa
Product: mlflowFixed in: 3.8.0rc0

Vendor Advisories (1)

pipGHSA-gq3w-7jj3-x7grcritical

MLflow Use of Default Password Authentication Bypass Vulnerability

Feb 21, 2026

References

access.redhat.com / security/cve/CVE-2026-2635
bugzilla.redhat.com / show_bug.cgi
security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-2635.json
github.com / mlflow/mlflow/pull/19260
zerodayinitiative.com / advisories/ZDI-26-111