CVE-2026-42345 FastGPT: Cloud metadata endpoint SSRF protection bypass via port specification, IPv6 mapping, hex/decimal IP encoding, and trailing dot

FastGPT is an AI Agent building platform. In versions 4.14.11 and prior, FastGPT's isInternalAddress function in packages/service/common/system/utils.ts blocks cloud metadata endpoints using a fullUrl.startsWith check against a hardcoded list. This check can be bypassed using at least 7 different...

CVE-2026-42345

FastGPT (version 4.14.11 and earlier) exposes an SSRF risk in isInternalAddress() (packages/service/common/system/utils.ts) where a fullUrl.startsWith() hardcoded blocklist can be bypassed by at least 7 URL-encoding techniques that resolve to the cloud metadata endpoint. The broader private IP ch...

is-localhost-ip 2.0.0 - SSRF

Titles: is-localhost-ip 2.0.0 - SSRF Author: nu11secur1ty Date: 11/09/2025 Vendor: https://github.com/tinovyatkin/is-localhost-ip Software: https://github.com/tinovyatkin/is-localhost-ip/releases/tag/v2.0.0 Reference: https://portswigger.net/web-security/ssrf Description: SSRF PoC — Professional...

K6922: Decimal-encoded IP address circumvents Accessibility Scope

Security Advisory Description Note : Versions that are not listed in this Solution have not been evaluated for vulnerability to this security advisory. For information about the F5 security policy regarding evaluating older and unsupported versions of F5 products, refer to K4602: Overview of the ...