CVE WatchJul 24, 2026

CVE-2026-42345

FastGPT is an AI Agent building platform. In versions 4.14.11 and prior, FastGPT's isInternalAddress() function in packages/service/common/s

CVSS

7.7

High

EPSS

0.2%

p12

KEV

—

Exploit Today

0-100

Published: May 8, 2026 · Last modified: Jul 24, 2026 · CWE-918

EPSS · 30d

0.2%EPSS · 30 days0.2%

2026-07-192026-08-15

Technical description

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.

Official references

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

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