CVE-2026-84301 - FastGPT safe axios SSRF guard still allows DNS rebinding TOCTOU on protected outbound requests

CVE-2026-84301 - FastGPT safe axios SSRF guard still allows DNS rebinding TOCTOU on protected outbound requests

https://cvefeed.io/rssfeed/latest.atom / Tue, 09/22/2026 - 19:33
CVE ID :CVE-2026-84301
Published : Sept. 22, 2026, 4:50 p.m. | 20 minutes ago
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.
Severity: 0.0 | NA
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