CVE-2026-19305Network attack vectorHinoki check available

Internal data disclosure via unvalidated model discovery URL

Published Sep 4, 2026 · Updated Sep 4, 2026

Server-side request forgery in IBM Langflow OSS 1.0.0 through 1.11.2 allows remote attackers to read sensitive internal data. The OpenAI-compatible model-discovery function sends a redirect-following HTTP GET to a user-controlled base URL without invoking the SSRF validation helper. No authentication is required; a reachable deployment can expose responses from internal services, cloud metadata endpoints, and databases accessible to the server.

CVSS severity8.6
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Server-side request forgery in IBM Langflow OSS 1.0.0 through 1.11.2 allows remote attackers to read sensitive internal data. The OpenAI-compatible model-discovery function sends a redirect-following HTTP GET to a user-controlled base URL without invoking the SSRF validation helper. No authentication is required; a reachable deployment can expose responses from internal services, cloud metadata endpoints, and databases accessible to the server.

The record

CVE
CVE-2026-19305
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
IBM
Product
Langflow OSS
Classifications
CWE-918, CAPEC-664, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=1.0.0 <=1.11.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · Langflow OSSversion=1.0.0 <=1.11.2

Published CVSS scores

8.6IBMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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