CVE-2026-69258 Details
Description
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the unauthenticated POST /api/v1/prediction/:id endpoint accepted an overrideConfig object and unconditionally spread it into internal flowConfig and flowData objects in packages/server/src/utils/buildChatflow.ts and packages/server/src/utils/index.ts without checking apiOverrideStatus. This allowed unauthenticated attackers to inject arbitrary properties into the flow execution context of any public chatflow, overwrite values such as chatId, sessionId, and chatHistory, and control values resolved through $flow.* template variables consumed by flow nodes. This issue is fixed in version 3.1.3.
A vulnerability in Flowise prior to version 3.1.3 allows unauthenticated property injection into the flow execution context via the POST /api/v1/prediction/:id endpoint. The issue arises because the overrideConfig object is unconditionally spread into internal flowConfig and flowData objects without proper validation. This flaw enables attackers to inject arbitrary properties, manipulate session-related values, and control template variables used by flow nodes. The vulnerability is particularly concerning as it can lead to session hijacking and unauthorized access to sensitive chatflow data.
Users are advised to update Flowise to version 3.1.3 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 5, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6vh2-wg4h-4vwj | CISA-ADP | ExploitVendor Advisory |
| https://github.com/FlowiseAI/Flowise/commit/23b997ee5ef9e269b628bad0f56f1ecb86bd2fca | [email protected] | Patch |
| https://github.com/FlowiseAI/Flowise/pull/6279 | [email protected] | Issue TrackingPatch |
| https://github.com/FlowiseAI/Flowise/releases/tag/[email protected] | [email protected] | PatchRelease Notes |
| https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6vh2-wg4h-4vwj | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
| CWE-915 | Improperly Controlled Modification of Dynamically-Determined Object Attributes | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| flowiseai flowise | < 3.1.3 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 14, 2026 | Initial Analysis | [email protected] |
| Aug 5, 2026 | CVE Modified | CISA-ADP |
| Aug 4, 2026 | New CVE Received | [email protected] |