CVE-2026-40252

Broken Access Control (IDOR) Leading to Cross-Tenant Application Access in FastGPT

HIGH
8.1
CVSS Score
Published: April 10, 2026 at 08:52 PM UTC
Updated: October 26, 2026 at 09:10 PM UTC
2 products affected across 2 vendorsFastgptFastGPT

Using FastGPT by labring?

Get instant alerts when new vulnerabilities affect FastGPT - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
HIGH8.1
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

FastGPT is an AI Agent building platform. Prior to 4.14.10.4, Broken Access Control vulnerability (IDOR/BOLA) allows any authenticated team to access and execute applications belonging to other teams by supplying a foreign appId. While the API correctly validates the team token, it does not verify that the requested application belongs to the authenticated team. This leads to cross-tenant data exposure and unauthorized execution of private AI workflows. This vulnerability is fixed in 4.14.10.4.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 4.14.10.4
v < 4.14.10.4
Affected range stops below 4.14.10.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://github.com/labring/FastGPT/security/advisories/GHSA-gc8m-w37w-24hw
x_refsource_MISCRelease Notes
Source: cverecord
https://github.com/labring/FastGPT/releases/tag/v4.14.10.4

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-284CWE-639

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card