CVE-2026-13442Network attack vector

Cross-user vector disclosure via unscoped FAISS namespaces

Published Jul 28, 2026 · Updated Jul 28, 2026

Authorization failure in IBM Langflow OSS 1.0.0 through 1.10.1 allows remote authenticated users to access and alter private vector data. Persistent FAISS vector-store namespaces accept another user's namespace identifier without enforcing owner scoping, so queries return owner-only content and writes poison later results. A low-privileged account and a reusable namespace identifier are required; impact is limited to cross-user disclosure and persistent result manipulation.

CVSS severity7.1
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization failure in IBM Langflow OSS 1.0.0 through 1.10.1 allows remote authenticated users to access and alter private vector data. Persistent FAISS vector-store namespaces accept another user's namespace identifier without enforcing owner scoping, so queries return owner-only content and writes poison later results. A low-privileged account and a reusable namespace identifier are required; impact is limited to cross-user disclosure and persistent result manipulation.

The record

CVE
CVE-2026-13442
Published
Jul 28, 2026
Updated
Jul 28, 2026
Vendor
IBM
Product
Langflow OSS
Classifications
CWE-520, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 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 <=1.10.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · Langflow OSSversion=1.0.0 <=1.10.1

Published CVSS scores

7.1IBM CorporationCVSS: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-520.NET Misconfiguration: Use of Impersonation
T1213Data from Information Repositories

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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