CVE-2026-81213Network attack vector

Unauthenticated internal-resource disclosure via unvalidated certificate URL

Published Sep 10, 2026 · Updated Sep 10, 2026

Server-side request forgery in IBM Langflow OSS 1.0.0 through 1.11.5 allows remote attackers to read internal resources via crafted URLs. The IBM Db2 Vector Store connector fetches a user-controlled SSL certificate URL without applying the shared SSRF validation guard. No credentials are required because the public flow build endpoint can invoke the connector, exposing only resources reachable from the server.

CVSS severity8.6
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in IBM Langflow OSS 1.0.0 through 1.11.5 allows remote attackers to read internal resources via crafted URLs. The IBM Db2 Vector Store connector fetches a user-controlled SSL certificate URL without applying the shared SSRF validation guard. No credentials are required because the public flow build endpoint can invoke the connector, exposing only resources reachable from the server.

The record

CVE
CVE-2026-81213
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
IBM
Product
Langflow OSS
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 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 <=1.11.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · Langflow OSSversion=1.0.0 <=1.11.5

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.

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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)
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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