Improper Origin Validation in mlflow/mlflow

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Summary

CVECVE-2026-2611
StatePUBLISHED
Assigner@huntr_ai
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-19 10:16:22 UTC
Updated2026-05-19 15:03:31 UTC
DescriptionIn MLflow version 3.9.0, the MLflow Assistant feature introduced improper origin validation in its /ajax-api endpoints. This vulnerability allows a remote attacker to exploit cross-origin requests from a malicious webpage to interact with the MLflow Assistant running on a victim's local machine. By bypassing the loopback-only restriction, the attacker can modify the Assistant's configuration to enable full access, which in turn allows the execution of arbitrary commands via the Claude Code sub-agent. This issue is resolved in version 3.10.0.

Risk And Classification

Primary CVSS: v3.0 9.6 CRITICAL from [email protected]

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

EPSS: 0.000360000 probability, percentile 0.112420000 (date 2026-05-28)

Problem Types: CWE-346 | CWE-346 CWE-346 Origin Validation Error

VersionSourceTypeScoreSeverityVector
3.0[email protected]Secondary9.6CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
3.0CNADECLARED9.6CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mlflow Mlflow/mlflow affected unspecified 3.10.0 custom Not specified

References

ReferenceSourceLinkTags
huntr.com/bounties/8462addd-b464-4a84-b6a2-5529604e6e5a 134c704f-9b21-4f2e-91b3-4a467353bcc0 huntr.com
github.com/mlflow/mlflow/commit/8f9c8a53af90842944101eb8b7d60706822c81bc [email protected] github.com
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