CVE•Published 2026-04-17•Modified 2026-04-27•1 article on news•5 live references•NVD data

CVE-2026-40351Fastgpt · Fastgpt

Vulnerability data via NVD (ingested)

CVSS v3.1

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS percentile

Exploit Prediction Scoring System · top 81% of all CVEs

Weaknesses (CWE)

CWE-943Improper Neutralization of Special Elements in Data Query Logic

Description

FastGPT is an AI Agent building platform. In versions prior to 4.14.9.5, the password-based login endpoint uses TypeScript type assertion without runtime validation, allowing an unauthenticated attacker to pass a MongoDB query operator object (e.g., {"$ne": ""}) as the password field. This NoSQL injection bypasses the password check, enabling login as any user including the root administrator. This issue has been fixed in version 4.14.9.5.

Timeline

Published 2026-04-17

Modified 2026-04-27

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-40351

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Fastgpt Fastgpt"

All exposed Fastgpt Fastgpt instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Fastgpt"

HTTP body or banner mentions "Fastgpt" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-40351