CVE-2026-26003 FastGPT Plugin forwarding request is not authenticated, posing a serious risk of attack
Unauthenticated attackers can access FastGPT plugin APIs, causing system crashes and loss of plugin installation status.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-26003?
CVE-2026-26003 is a medium-severity missing authorization vulnerability in labring FastGPT, published on 10 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
FastGPT is an AI Agent building platform. From 4.14.0 to 4.14.5, attackers can directly access the plugin system through FastGPT/api/plugin/xxx without authentication, thereby threatening the plugin system. This may cause the plugin system to crash and the loss of plugin installation status, but it will not result in key leakage. For older versions, as there are only operation interfaces for obtaining information, the impact is almost negligible. This vulnerability is fixed in 4.14.5-fix.
Weakness: CWE-601
Which versions are affected by CVE-2026-26003?
It affects 1 product.
Products include Fastgpt Fastgpt.
How do I fix CVE-2026-26003?
No fix has been published for CVE-2026-26003 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-26003 being exploited?
There is no known exploitation of CVE-2026-26003 in the wild and no public exploit code.
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-2026-40352 FastGPT: NoSQL Injection in updatePasswordByOld Leads to Account Takeover
- CVE-2026-34163 Server-Side Request Forgery via MCP Tools Endpoint in FastGPT
Sources
Also known as GHSA-wcrg-g824-9gfg.