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CVE-2026-61684 (GCVE-0-2026-61684)

Vulnerability from cvelistv5 – Published: 2026-07-15 14:28 – Updated: 2026-07-15 15:07
VLAI
Title
FastGPT: Unauthenticated cross-tenant data access via forgeable plugin-invoke JWT (default INVOKE_TOKEN_SECRET='token')
Summary
FastGPT is a knowledge-based AI application platform. In 4.15.0-beta4, FastGPT plugin invoke reverse-call endpoints under /api/invoke/* authenticate only by verifying a JWT signed with INVOKE_TOKEN_SECRET, which defaults to the constant string token and was not set in official deployment templates. An unauthenticated attacker can self-sign an HS256 JWT and reach /api/invoke/userInfo to disclose cross-tenant user PII by attacker-supplied tmbId values, or /api/invoke/fileUpload to write attacker-controlled content into chat files. This issue is fixed in version 4.15.0-beta5.
Severity
8.8 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-15 15:07 UTC
CWE
  • CWE-798 - Use of Hard-coded Credentials
Assigner
References
Impacted products
Vendor Product Version CPE status
labring FastGPT Affected: = 4.15.0-beta4
guessed Create a notification for this product.
Show details on NVD website
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