CVE-2026-42345 (GCVE-0-2026-42345)
Vulnerability from cvelistv5
Published
2026-05-08 22:11
Modified
2026-05-13 17:47
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Summary
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.
Impacted products
Vendor Product Version
labring FastGPT Version: <= 4.14.11
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Show details on NVD website


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