CVE-2026-9130Network attack vector

Cross-user chat disclosure via session ID collision

Published Aug 5, 2026 · Updated Aug 5, 2026

Authorization bypass in IBM Langflow OSS 1.0.0 through 1.10.3 allows remote authenticated users to read other users' chat history. The MemoryComponent.retrieve_messages and store_message methods query solely by session_id without validating flow_id or user_id ownership. Exploitation requires a multi-user deployment with LANGFLOW_AUTO_LOGIN=False and exposes or alters messages associated with a colliding session identifier.

CVSS severity7.1
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in IBM Langflow OSS 1.0.0 through 1.10.3 allows remote authenticated users to read other users' chat history. The MemoryComponent.retrieve_messages and store_message methods query solely by session_id without validating flow_id or user_id ownership. Exploitation requires a multi-user deployment with LANGFLOW_AUTO_LOGIN=False and exposes or alters messages associated with a colliding session identifier.

The record

CVE
CVE-2026-9130
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
IBM
Product
Langflow OSS
Classifications
CWE-639, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 <=1.10.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · Langflow OSSversion=1.0.0 <=1.10.3

Published CVSS scores

7.1IBMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1213Data from Information Repositories

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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