CVE-2026-40352 FastGPT: NoSQL Injection in updatePasswordByOld Leads to Account Takeover
An authenticated attacker can exploit NoSQL injection in the password change endpoint to bypass verification and take over accounts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-40352?
CVE-2026-40352 is a high-severity SQL injection vulnerability in labring FastGPT, published on 17 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
FastGPT is an AI Agent building platform. In versions prior to 4.14.9.5, the password change endpoint is vulnerable to NoSQL injection. An authenticated attacker can bypass the "old password" verification by injecting MongoDB query operators. This allows an attacker who has gained a low-privileged session to change the password of their account (or others if combined with ID manipulation) without knowing the current one, leading to full account takeover and persistence. This issue has been fixed in version 4.14.9.5.
Weakness: CWE-943
Which versions are affected by CVE-2026-40352?
It affects 1 product.
Products include Fastgpt Fastgpt.
How do I fix CVE-2026-40352?
No fix has been published for CVE-2026-40352 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-40352 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40352 exists.
Other vulnerabilities in labring FastGPT
- CVE-2026-34162 FastGPT: Unauthenticated SSRF via httpTools Endpoint Leads to Internal API Key Theft
- CVE-2026-40351 FastGPT: NoSQL Injection in loginByPassword leads to Authentication Bypass
- CVE-2026-33075 FastGPT has Arbitrary Code Execution in GitHub Actions via pull_request_target in fastgpt-preview-image.yml
- CVE-2026-34163 Server-Side Request Forgery via MCP Tools Endpoint in FastGPT
- CVE-2026-26075 Cross-Site Request Forgery (CSRF) in FastGPT
Sources
Also known as GHSA-422w-vrfj-72g6.