{"id":"CVE-2026-55787","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-55787","generatedAt":"2026-10-28T00:53:07.487Z","title":"Flyto2 Core is an execution kernel for automation and AI-agent workflows.","description":"Flyto2 Core is an execution kernel for automation and AI-agent workflows. Prior to 2.26.3, validate_url_ssrf and is_private_ip in src/core/utils.py compare resolved addresses only against native private IPv4 and IPv6 ranges and do not unwrap IPv4-mapped, IPv4-compatible, 6to4, or NAT64 transition addresses. An authenticated workflow author can provide a transition-form literal URL through the Execution API POST /v1/execute route, http.get, or sibling guarded outbound-request modules, causing the guard to accept an address whose embedded IPv4 points to loopback, RFC 1918, or cloud metadata services. On a host that routes the selected transition form, the outbound request reaches the internal destination and returns the response body to the workflow caller, enabling read SSRF and disclosure of internal-service data or cloud credentials. This issue is fixed in version 2.26.3.","published":"2026-10-14T19:17:18.000Z","lastModified":"2026-10-16T20:04:30.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":7.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N"},"cwe":["CWE-918"],"affected":[],"epss":{"score":0.00292,"percentile":0.21592,"date":"2026-10-26","history":[{"date":"2026-10-15","score":0.00236,"percentile":0.13486}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.29%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-14T19:17:18.000Z","detail":{"score":"7.1","severity":"HIGH","publishedAt":"2026-10-14T19:17:17.927Z"},"summary":"New CVE, high severity (CVSS 7.1)."}],"references":[{"url":"https://github.com/flytohub/flyto-core/commit/519e040384a74984848c4e84a6600e5f1020a6d2","source":"security-advisories@github.com"},{"url":"https://github.com/flytohub/flyto-core/pull/20","source":"security-advisories@github.com"},{"url":"https://github.com/flytohub/flyto-core/releases/tag/v2.26.3","source":"security-advisories@github.com"},{"url":"https://github.com/flytohub/flyto-core/security/advisories/GHSA-794r-5rp2-fpg8","source":"security-advisories@github.com"},{"url":"https://github.com/flytohub/flyto-core/security/advisories/GHSA-794r-5rp2-fpg8","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-55787","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}