CVE-2026-2611

Summary

In 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.

Affected Software

Weaknesses

• CWE-346: CWE-346 Origin Validation Error

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: total

Additional References

• https://huntr.com/bounties/8462addd-b464-4a84-b6a2-5529604e6e5a

mlflow: MLflow: Arbitrary Code Execution via Improper Origin Validation

Additional References

• https://access.redhat.com/security/cve/CVE-2026-2611
• https://bugzilla.redhat.com/show_bug.cgi?id=2479797
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2611.json

References

• https://huntr.com/bounties/8462addd-b464-4a84-b6a2-5529604e6e5a
• https://github.com/mlflow/mlflow/commit/8f9c8a53af90842944101eb8b7d60706822c81bc

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