{"id":"CVE-2026-84301","revision":"f46f242c7f0e4f4c9cf1bdd20d6685c2","records":[{"revision":"f46f242c7f0e4f4c9cf1bdd20d6685c2","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-84301","aliases":[],"title":"FastGPT safe axios SSRF guard still allows DNS rebinding TOCTOU on protected outbound requests","description":"FastGPT is an open-source LLM platform for building AI applications on a knowledge base. Prior to 4.15.2, the safe Axios request interceptor in packages/service/common/api/axios.ts validates a hostname with isInternalAddress() before a later HTTP connection performs an independent DNS lookup, creating a DNS rebinding window, allowing an attacker-controlled hostname to resolve publicly during the check and to a loopback, private, link-local, or metadata address during connection. An authenticated attacker who can supply a URL to a safe-Axios-backed HTTP tool, workflow HTTP node, external file fetch, or other server-side integration can use this time-of-check/time-of-use gap to reach services that direct private-address inputs would block. The same independent re-resolution occurs after manual redirect hops because each redirect target is checked before a separate connection lookup. This issue is fixed in version 4.15.2.","state":0,"publishedAt":"2026-09-22T16:50:19.79+00:00","modifiedAt":"2026-09-25T23:45:50.724+00:00","affected":[{"ecosystem":"Vendor product","name":"FastGPT","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"labring\",\n                    \"product\": \"FastGPT\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 4.15.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N","score":6.3,"severity":"MEDIUM"}],"references":["https://github.com/labring/FastGPT/security/advisories/GHSA-6jwp-qf29-hpj9","https://github.com/labring/FastGPT/pull/7261","https://github.com/labring/FastGPT/commit/0a38565c9d1f790045636bd9d55f8d2296c938c7","https://github.com/labring/FastGPT/releases/tag/v4.15.2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-84301","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-84301","identifiers":["CVE-2026-84301"]},"retained":false,"historicalAffected":[]}],"coverage":[]}