Detections
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SCA: security update for flyto-core (GHSA-h9f9-h6gm-wc85)

high Tenable Self-Hosted Container Security Plugin ID 444418

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2026-55786)

Solution

Update the flyto-core library and its related packages to version 2.26.4 or later.

See Also

https://github.com/advisories/GHSA-h9f9-h6gm-wc85

Plugin Details

Severity: High

ID: 444418

Version: Revision 1.4

Type: Local

Family: SCA Checks

Published: 7/6/2026

Updated: 10/14/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.5

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-55786

CVSS v3

Risk Factor: High

Base Score: 8.4

Temporal Score: 7.3

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/6/2026

Vulnerability Publication Date: 7/6/2026

Reference Information

CVE: CVE-2026-55786