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CVE-2026-55418: FastGPT < 4.15.0-beta5
CVE-2026-55418. CVSS 3.1 base score 8.6 (HIGH, Vendor/CNA). EPSS 0.00482 (percentile 0.41248), scored 25-Oct-2026.
Affected technology
FastGPT · < 4.15.0-beta5
labring
Component: Not specified by the source
Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · No user interaction required
What an attacker can do
The source says because S3 object keys are global within the bucket and carry the tenant id only as a path segment, an attacker can supply another team's key and obtain its file contents through the chat-file presign endpoint or dataset preview endpoint. Vendor/CNA’s CVSS 3.1 assessment (base score 8.6/10) rates confidentiality impact as high; integrity and availability impact as none.
- CWE
- CWE-639
- CCR priority
- 34.5 /100 (P4)
- CVSS 3.1
- 8.6 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N · Vendor/CNA
- EPSS
- 0.00482 · percentile 0.41248 · 2026-10-25
- KEV
- no
Provenance
- NVD CVE API 2.0 · Source record · observed 2026-10-25 21:44:36.062275+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2026-55418.html