CVE-2026-42345

תיאור (מקור, אנגלית)

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 URL encoding techniques, all of which resolve to the same cloud metadata service but do not match the blocklist patterns. Additionally, the broader private IP check (isInternalIPv4/isInternalIPv6) is disabled by default because CHECK_INTERNAL_IP defaults to false (not 'true'), so these bypasses reach the metadata endpoint without any further validation. At time of publication, there are no publicly available patches.

מדדים

CVSS 3.1

7.7 (HIGH) מקור הציון: CNA CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

EPSS — סבירות ניצול

0% (אחוזון 000) נכון ל-2/8/2026

CWE

CWE-918

קישורים

• https://github.com/labring/FastGPT/security/advisories/GHSA-jhqw-944x-xh94