CVE-2026-55786

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Source

https://cve.org/CVERecord?id=CVE-2026-55786

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55786.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-55786

Aliases

Published

2026-10-14T18:14:39Z

Modified

2026-10-31T02:31:06Z

Severity

8.4 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

Flyto2 Core: Unauthenticated Command Execution via HTTP MCP `execute_module`

Details

Flyto2 Core is an execution kernel for automation and AI-agent workflows. From 2.26.2 until 2.26.4, the HTTP MCP POST /mcp route accepts unauthenticated JSON-RPC tools/call requests and forwards execute_module arguments to the module registry without the require_auth dependency used by the REST execution routes. An unauthenticated caller can select sandbox.execute_shell and supply its command parameter, which reaches asyncio.create_subprocess_shell with the privileges of the flyto-core server process. The endpoint is reachable locally under the default loopback binding and becomes network reachable when an operator binds the server to a non-loopback interface, allowing arbitrary OS command execution and potential full host compromise. This issue is fixed in version 2.26.4.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-306",
        "CWE-78"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55786.json"
}

References

Affected packages

Git / github.com/flytohub/flyto-core

Affected ranges

Type

GIT

Repo

https://github.com/flytohub/flyto-core

Events

Introduced

Fixed

50d0d327a1278c8cec9495ba5f6f010dd67ef19c

Fixed

db7f116b1d3c5dcf94aded00d14118f81f3e225e

Database specific

Show details

{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "2.26.2"
                },
                {
                    "fixed": "2.26.4"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "db7f116b1d3c5dcf94aded00d14118f81f3e225e"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v2.26.4",
            "range": [
                {
                    "fixed": "50d0d327a1278c8cec9495ba5f6f010dd67ef19c"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v2.*

v2.16.3

v2.17.6

v2.2.2

v2.25.27

v2.26.0

v2.26.3

v2.5.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55786.json"