Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-69258

CVE-2026-69258HIGH

FlowiseAI Flowise — Flowise: Unauthenticated Property Injection into Flow Execution Context via Ungated `overrideConfig` Spread in Prediction API

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   L   H   N    8.8   .0067   50.1     —

AFFECTED
  Product  Versions   Fixed
  Flowise  < 3.1.3 –  —

TIMELINE
  Aug 3   Reserved by GitHub_M
  Aug 4   Published (CNA: GitHub_M)
  Sep 14  EXPLOIT PUBLISHED — CVE-2026-69258 (FlowiseAI Flowise). Public exploit reference added.

CWE-639, CWE-915 · CNA: GitHub_M · CVSS v4.0 · 4 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 3, 2026	Reserved	Reserved by GitHub_M
August 4, 2026	Published	Published (CNA: GitHub_M)
September 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-69258 (FlowiseAI Flowise). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
FlowiseAI	Flowise	—	< 3.1.3	—

Weaknesses

CWE-639 · CWE-915

References (4)

https://github.com/FlowiseAI/Flowise/commit/23b997ee5ef9e269b628bad0f56f1ecb86bd2fca [Patch]
https://github.com/FlowiseAI/Flowise/pull/6279 [Issue Tracking, Patch]
https://github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3 [Patch, Release Notes]
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6vh2-wg4h-4vwj [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-69258 at cve.org

Vendors: flowiseai

Weaknesses: CWE-639 · CWE-915

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-69258 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.