--- title: "CVE-2026-55786: Flyto2 Core - Remote Code Execution" description: "Flyto2 Core 2.26.2 to 2.26.4 contains a remote code execution caused by unauthenticated JSON-RPC requests forwarding execute_module arguments without authentication, letting unauthenticated attackers execute arbitrary OS commands, exploit requires network or local access to the MCP POST /mcp route." url: https://panop.io/threat-heartbeat/CVE-2026-55786/ --- # CVE-2026-55786 Flyto2 Core - Remote Code Execution Flyto2 Core 2.26.2 to 2.26.4 contains a remote code execution caused by unauthenticated JSON-RPC requests forwarding execute\_module arguments without authentication, letting unauthenticated attackers execute arbitrary OS commands, exploit requires network or local access to the MCP POST /mcp route. CVSS base score 8.4 /10 High CISA KEV Exploited in the wild Public exploit None known Authentication Not required [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-55786) ## Details Type Remote Code Execution Impact Remote Code Execution CVSS vector CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Published 14 October 2026 Updated 15 October 2026 Weakness [CWE-78](https://cwe.mitre.org/data/definitions/78.html) ## Vendor fix Update to version 2.26.4 or later. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-55786](https://nvd.nist.gov/vuln/detail/CVE-2026-55786) - [https://previdian.com/CVE-2026-55786](https://previdian.com/CVE-2026-55786) - [https://github.com/flytohub/flyto-core/commit/db7f116b1d3c5dcf94aded00d14118f81f3e225e](https://github.com/flytohub/flyto-core/commit/db7f116b1d3c5dcf94aded00d14118f81f3e225e) - [https://github.com/flytohub/flyto-core/releases/tag/v2.26.4](https://github.com/flytohub/flyto-core/releases/tag/v2.26.4) - [https://github.com/flytohub/flyto-core/security/advisories/GHSA-h9f9-h6gm-wc85](https://github.com/flytohub/flyto-core/security/advisories/GHSA-h9f9-h6gm-wc85) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)