Auth bypass in Fastgpt
CVE-2026-34162
FastGPT is an AI Agent building platform. Prior to version 4.14.9.5, the FastGPT HTTP tools testing endpoint (/api/core/app/httpTools/runTool) is exposed without any authentication. This endpoint acts as a full HTTP proxy — it accepts a user-supplied baseUrl, toolPath, HTTP method, custom headers, and body, then makes a server-side HTTP request and returns the complete response to the caller. This issue has been patched in version 4.14.9.5.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.004 (35.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Fastgpt
- Labring Fastgpt — versions < 4.14.9.5
Weakness classification (CWE)
References
- github.com/labring/FastGPT/security/advisories/GHSA-w36r-f268-pwrj (Exploit, Mitigation, Vendor Advisory)
- github.com/labring/FastGPT/pull/6640 (Patch, Issue Tracking)
- github.com/labring/FastGPT/commit/bc7eae2ed61481a5e322208829be291faec58c00 (Patch)
- github.com/labring/FastGPT/releases/tag/v4.14.9.5 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-34162?
- CVE-2026-34162 is a critical-severity vulnerability in Fastgpt, classified under Missing Authentication for Critical Function. CVSS score: 10.0/10. Published 2026-03-31.
- How severe is CVE-2026-34162?
- Critical severity. CVSS v3 base score is 10.0 out of 10.