AUGUST 16, 2026
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Case File

CVE-2026-69258

HIGH · CVSS 8.8 EPSS 0.38% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-04 · Last synced 2026-08-16

CyberRota Analysis

AI-Generated

The vulnerability in Flowise allows unauthenticated attackers to exploit the POST /api/v1/prediction/:id endpoint, enabling them to inject arbitrary properties into the flow execution context of public chatflows. This could lead to unauthorized control over critical values like chatId and sessionId, potentially compromising the integrity of chat interactions. Organizations using versions prior to 3.1.3 should prioritize updating to the latest version to mitigate this risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

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CVE
CVE-2026-69258
Severity
HIGH
CVSS
8.8
EPSS
0.38%

Original NVD 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.