CVE-2026-102610

What it is

fast-agent is a framework for building, running, and evaluating AI agents with Model Context Protocol support. Prior to 0.7.21, fast-agent serve uses HTTP transport bound to 0.0.0.0 on port 8000 without authentication, allowing any network client that can reach the /mcp endpoint to invoke the exposed agent tool. When the server is started with --shell, the agent can call the local execute tool implemented by tools/local_shell_executor.py, so an unauthenticated remote client can cause operating-system commands to run as the server user; without --shell, the client can still consume the operator's model and configured MCP tools. The defaults are defined in cli/commands/serve.py and mcp/server/agent_server.py, and the non-interactive server permission prompt does not prevent the described access. This issue is fixed in version 0.7.21.

At a glance

Exploitability

Can be exploited over the network with an admin-level account, but needs a user to act. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-09-29 14:18 UTC ReservedThe CVE id was reserved by its CNA
2. 2026-11-06 21:17 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-11-06 21:17 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.3% in the next 30 days (EPSS).
• Severity: 6.4 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2026-11-06 21:17 UTC

Last modified

2026-11-06 21:17 UTC

Exploit probability

0.3% · EPSS, next 30 days

Weakness

CWE-78 · OS command injection

Record status

Received

Attack profile CVSS 3.1 · 6.4

Attack vector

Network

Complexity

High

Privileges needed

High

User interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-102610.md and follow it. Check whether this project is affected by CVE-2026-102610. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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