CVE-2026-38924

Published Sep 14, 2026 CVSS 3.1 · 2.9 Low EPSS < 1% KEV · Not listed
Description
In Oraios AI Serena before 1.0.0, the listen address of the MCP server in HTTP mode is 0.0.0.0. NOTE: the Supplier observed that 0.0.0.0 was a "potential security hazard" but the Serena documentation, at the time of the issue report proposing 127.0.0.1 instead of 0.0.0.0, recommended "use a sandboxed environment for running Serena."

Analysis

AI-generated

Technical impact

A server component of Oraios AI Serena exposed by default through a configuration that causes the MCP server in HTTP mode to listen on all network interfaces, 0.0.0.0. This setting widens the potential attack surface, allowing any node on a network that can reach the host to connect to the MCP server without encountering a local‑interface restriction. The vulnerability does not describe an additional privilege or code‑execution flaw; it simply increases the reachability of the underlying HTTP interface.

Affected Systems

Oraios AI Serena versions prior to 1.0.0 employ the default 0.0.0.0 listen address for the MCP server, making the service accessible from every network interface on the host.

Risk and Exploitability

The base CVSS score of 2.9 flags the issue as low severity. The EPSS score of less than 1% signals a very low likelihood of exploitation, and the vulnerability is not included in the CISA KEV catalog. The additional exposure may allow an attacker to discover service functionality or attempt non‑authenticated interactions, but no evidence of privileged actions or direct code execution is present in the publicly available information.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade Oraios AI Serena to version 1.0.0 or later, which binds the MCP server to a local interface.
  • Reconfigure the MCP server to bind to 127.0.0.1 or another private interface to prevent external exposure.
  • Apply firewall rules to block inbound traffic to the MCP server port until a proper update or configuration change is in place.

Generated by OpenCVE AI on September 15, 2026 at 16:43 UTC.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Serena MCP Server Listens on All Network Interfaces
Type Values Removed Values Added
Title Serena MCP Server Listens on All Network Interfaces
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Oraios-ai
Oraios-ai serena
Vendors & Products Oraios-ai
Oraios-ai serena
Type Values Removed Values Added
Description In Oraios AI Serena before 1.0.0, the listen address of the MCP server in HTTP mode is 0.0.0.0. NOTE: the Supplier observed that 0.0.0.0 was a "potential security hazard" but the Serena documentation, at the time of the issue report proposing 127.0.0.1 instead of 0.0.0.0, recommended "use a sandboxed environment for running Serena."
Weaknesses CWE-669
References
Metrics cvssV3_1

{'score': 2.9, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'}

Weaknesses
  • CWE-669

    Incorrect Resource Transfer Between Spheres

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Sep 14, 2026, 4:32 PM
Reserved
Apr 6, 2026, 12:00 AM
Status
Deferred
Published
Sep 14, 2026, 3:16 AM
Modified
Sep 22, 2026, 8:00 PM