--- title: "CVE-2026-55787: Flyto2 Core - Server Side Request Forgery" description: "Flyto2 Core < 2.26.3 contains a server-side request forgery caused by improper validation of transition-form IP addresses in URL checks, letting authenticated workflow authors read internal services and cloud metadata via crafted URLs." url: https://panop.io/threat-heartbeat/CVE-2026-55787/ --- # CVE-2026-55787 Flyto2 Core - Server Side Request Forgery Flyto2 Core < 2.26.3 contains a server-side request forgery caused by improper validation of transition-form IP addresses in URL checks, letting authenticated workflow authors read internal services and cloud metadata via crafted URLs. CVSS base score 7.1 /10 High CISA KEV Not listed Public exploit None known Authentication Required [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-55787) ## Details Type Server Side Request Forgery Impact Information Disclosure CVSS vector CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N Published 14 October 2026 Updated 15 October 2026 Weakness [CWE-918](https://cwe.mitre.org/data/definitions/918.html) ## Vendor fix Update to version 2.26.3 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-2026-55787](https://nvd.nist.gov/vuln/detail/CVE-2026-55787) - [https://github.com/flytohub/flyto-core/commit/519e040384a74984848c4e84a6600e5f1020a6d2](https://github.com/flytohub/flyto-core/commit/519e040384a74984848c4e84a6600e5f1020a6d2) - [https://github.com/flytohub/flyto-core/pull/20](https://github.com/flytohub/flyto-core/pull/20) - [https://github.com/flytohub/flyto-core/releases/tag/v2.26.3](https://github.com/flytohub/flyto-core/releases/tag/v2.26.3) - [https://github.com/flytohub/flyto-core/security/advisories/GHSA-794r-5rp2-fpg8](https://github.com/flytohub/flyto-core/security/advisories/GHSA-794r-5rp2-fpg8) [← 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)