PT-2026-60191 · Fastgpt · Fastgpt
CVE-2026-61684
·
Published
2026-07-15
·
Updated
2026-07-15
CVSS v4.0
8.8
High
| Vector | AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Name of the Vulnerable Software and Affected Versions
FastGPT version 4.15.0-beta4
Description
FastGPT plugin invoke reverse-call endpoints under '/api/invoke/*' authenticate by verifying a JSON Web Token (JWT) signed with
INVOKE TOKEN SECRET. Because this secret defaults to a constant string and was not configured in official deployment templates, an unauthenticated attacker can self-sign an HS256 JWT. This allows access to the '/api/invoke/userInfo' endpoint to disclose cross-tenant user personally identifiable information (PII) via the tmbId variable, or the '/api/invoke/fileUpload' endpoint to write controlled content into chat files.Recommendations
Update to version 4.15.0-beta5.
Exploit
Fix
Using Hardcoded Credentials
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Weakness Enumeration
Related Identifiers
Affected Products
Fastgpt