PT-2026-33519 · Fastgpt · Fastgpt

August829 · CVE-2026-40351 · Published 2026-04-17 · Updated 2026-04-27

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions FastGPT versions prior to 4.14.9.5

Description The password-based login endpoint uses TypeScript type assertion without runtime validation. This allows an unauthenticated attacker to use a MongoDB query operator object, such as {"$ne": ""}, in the password field. This NoSQL injection—a technique where an attacker uses database-specific syntax to manipulate queries—bypasses authentication checks, enabling unauthorized access to any user account, including the root administrator.

Recommendations Update to version 4.14.9.5.

Exploit

Fix

Weakness Enumeration

CWE-943

Related Identifiers

CVE-2026-40351

GHSA-X8MX-2MR7-H9XG

Affected Products

Fastgpt

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40351.json · Exploit
• https://github.com/labring/FastGPT/security/advisories/GHSA-x8mx-2mr7-h9xg · Vendor Advisory
• https://github.com/labring/FastGPT/commit/bd966d479fbe414d02679cf79f9eaaab3d100a2d · Patch
• https://osv.dev/vulnerability/CVE-2026-40351 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-40351 · Security Note
• https://github.com/labring/FastGPT/releases/tag/v4.14.9.5 · Note
• https://twitter.com/0dayPublishing/status/2045252146459758845 · Twitter Post
• https://t.me/cveNotify/161145 · Telegram Post
• https://twitter.com/newclawtimes/status/2045562021228450216 · Twitter Post
• https://twitter.com/ctiwatchcloud/status/2045472424167153953 · Twitter Post
• https://twitter.com/CVEnew/status/2045467387999199576 · Twitter Post