High 8.8Published Aug 4, 2026

CVE-2026-69258Flowise: Unauthenticated Property Injection into Flow Execution Context via Ungated `overrideConfig` Spread in Prediction API

Updated under an hour ago (2026-10-19 13:50 UTC)

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It affects FlowiseAI Flowise. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-639, CWE-915
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

FlowiseAI Flowise flowiseai:flowise (from the name)	before 3.1.3	CNA record
flowiseai flowise flowiseai:flowise	before 3.1.3	NVD

References

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6vh2-wg4h-4vwjx-refsource-confirm, exploit, vendor-advisory
https://github.com/FlowiseAI/Flowise/pull/6279x-refsource-misc, issue-tracking, patch
https://github.com/FlowiseAI/Flowise/commit/23b997ee5ef9e269b628bad0f56f1ecb86bd2fcax-refsource-misc, patch
https://github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3x-refsource-misc, patch, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.