Auth bypass in Labring Fastgpt
CVE-2026-55418
FastGPT is an open source AI knowledge base platform. Prior to v4.15.0-beta5, two FastGPT file handlers authorize an unrelated resource and then sign or read an S3 object using a key taken directly from the request, without checking that t…
Vulnerability class: IDOR (Insecure Direct Object Reference)
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.
Affected products
- Labring Fastgpt — versions < 4.15.0-beta5
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-55418?
- CVE-2026-55418 is a high-severity vulnerability in Labring Fastgpt, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.6/10. Published 2026-07-07.
- How severe is CVE-2026-55418?
- High severity. CVSS v3 base score is 8.6 out of 10.