{"id":"CVE-2026-84301","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-84301","generatedAt":"2026-10-27T23:59:00.297Z","title":"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…","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.","published":"2026-09-22T17:17:27.000Z","lastModified":"2026-09-26T00:16:37.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":6.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N"},"cwe":["CWE-918"],"affected":[],"epss":{"score":0.00285,"percentile":0.20875,"date":"2026-10-26","history":[{"date":"2026-09-23","score":0.00363,"percentile":0.30176}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.29%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-22T17:17:27.000Z","detail":{"score":"6.3","severity":"MEDIUM","publishedAt":"2026-09-22T17:17:26.860Z"},"summary":"New CVE, medium severity (CVSS 6.3)."}],"references":[{"url":"https://github.com/labring/FastGPT/commit/0a38565c9d1f790045636bd9d55f8d2296c938c7","source":"security-advisories@github.com"},{"url":"https://github.com/labring/FastGPT/pull/7261","source":"security-advisories@github.com"},{"url":"https://github.com/labring/FastGPT/releases/tag/v4.15.2","source":"security-advisories@github.com"},{"url":"https://github.com/labring/FastGPT/security/advisories/GHSA-6jwp-qf29-hpj9","source":"security-advisories@github.com"},{"url":"https://github.com/labring/FastGPT/security/advisories/GHSA-6jwp-qf29-hpj9","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-84301","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."}