CVE-2026-43995Public exploitNetwork attack vector

SSRF via direct unvalidated HTTP client calls

Published May 11, 2026 · Updated May 11, 2026

SSRF in Flowise before 3.1.0 allows remote authenticated users to access internal resources through enabled vulnerable tools. OpenAPIToolkit, WebScraperTool, MCP, and Arxiv call node-fetch or axios directly, bypassing httpSecurity.ts deny-list, DNS validation, IP pinning, and loopback checks. Exploitation requires an affected tool to be enabled and can expose internal services or cloud metadata credentials to the chat context.

CVSS severity5.3
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Flowise before 3.1.0 allows remote authenticated users to access internal resources through enabled vulnerable tools. OpenAPIToolkit, WebScraperTool, MCP, and Arxiv call node-fetch or axios directly, bypassing httpSecurity.ts deny-list, DNS validation, IP pinning, and loopback checks. Exploitation requires an affected tool to be enabled and can expose internal services or cloud metadata credentials to the chat context.

The record

CVE
CVE-2026-43995
Published
May 11, 2026
Updated
May 11, 2026
Vendor
FlowiseAI
Product
Flowise
Classifications
CWE-918, T1212
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 11, 2026CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FlowiseAI · Flowiseversion=< 3.1.0

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1212Exploitation for Credential Access

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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