{"affected":[{"product":"fast-agent","source":"CNA: GitHub_M","vendor":"evalstate","versions":[{"status":"affected","version":"< 0.7.21"}]}],"cveId":"CVE-2026-102610","cwes":["CWE-78","CWE-306"],"description":"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":6.4,"severity":"medium","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793998555852,"publishedAt":1793998555852,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/evalstate/fast-agent/security/advisories/GHSA-9vhv-g5hf-m7m7"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/evalstate/fast-agent/pull/828"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/evalstate/fast-agent/commit/ba99f89c3ec7f1ef1c8b1ebce381c12b60dfea29"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/evalstate/fast-agent/releases/tag/v0.7.21"}],"remediation":[],"revision":"b5e1c43f77f578543ccde0ef5665bb80cebd3a22a19c21764fcd1ad07290290c","sources":[{"modifiedAt":1793998555852,"name":"CNA: GitHub_M","retrievedAt":1793999326972,"url":"https://www.cve.org/CVERecord?id=CVE-2026-102610"}],"ssvc":null,"status":"published","title":"fast-agent: `fast-agent serve` binds HTTP to 0.0.0.0 with no authentication by default; with --shell this is unauthenticated remote command execution","updatedAt":1793999326972}