PT-2026-60191 · Labring · Fastgpt

Published 2026-07-15 · Updated 2026-07-15 · CVE-2026-61684

Mitre

CVSS v4.0

8.8

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

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.

Exploit

Fix

Using Hardcoded Credentials

Weakness Enumeration

CWE-798

Related Identifiers

CVE-2026-61684

Affected Products

Fastgpt

References · 5

• 🔥 https://github.com/labring/FastGPT/security/advisories/GHSA-w732-rq8c-chc8 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-61684 · Security Note
• https://github.com/labring/FastGPT/commit/f5f1e58b25571b7107ca49d9bf96bb2b0e0a620a · Note
• https://github.com/labring/FastGPT/pull/7170 · Note
• https://github.com/labring/FastGPT/releases/tag/v4.15.0-beta5 · Note