CVE-2026-7869Public exploitNetwork attack vectorHinoki check available

Arbitrary file writes via uncontained knowledge-base paths

Published Aug 5, 2026 · Updated Aug 5, 2026

Path traversal in IBM Langflow OSS 1.0.0 through 1.10.3 allows remote authenticated users to write files outside intended storage. The create_knowledge_base handler builds a filesystem path directly from the supplied knowledge-base name and creates it without resolving the path or checking containment. Any authenticated account that can call the Knowledge Bases API can create directories and write files wherever the Langflow process has filesystem permission.

CVSS severity5.4
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path traversal in IBM Langflow OSS 1.0.0 through 1.10.3 allows remote authenticated users to write files outside intended storage. The create_knowledge_base handler builds a filesystem path directly from the supplied knowledge-base name and creates it without resolving the path or checking containment. Any authenticated account that can call the Knowledge Bases API can create directories and write files wherever the Langflow process has filesystem permission.

The record

CVE
CVE-2026-7869
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
IBM
Product
Langflow OSS
Classifications
CWE-22, T1190
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

5.4IBMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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 exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

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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