CVE-2026-19303Network attack vectorHinoki check available

Authenticated arbitrary file deletion via unchecked paths

Published Sep 4, 2026 · Updated Sep 4, 2026

Path traversal in IBM Langflow OSS 1.0.0 through 1.11.2 allows remote authenticated users to delete arbitrary local files. In S3 storage mode, path resolution skips local-access confinement and delete-after-processing passes the raw supplied path to local filesystem deletion. A valid user session or API key is required, and deletion is limited to files or directories accessible to the Langflow process identity.

CVSS severity8.1
High
EPSS probability0.39%
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 1.11.2 allows remote authenticated users to delete arbitrary local files. In S3 storage mode, path resolution skips local-access confinement and delete-after-processing passes the raw supplied path to local filesystem deletion. A valid user session or API key is required, and deletion is limited to files or directories accessible to the Langflow process identity.

The record

CVE
CVE-2026-19303
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
IBM
Product
Langflow OSS
Classifications
CWE-22, T1190
Attack vector
network
Privileges
authenticated

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 privilegesauthenticated

What is affected?

IBM · Langflow OSSversion=1.0.0 <=1.11.2

Published CVSS scores

8.1IBMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

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-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
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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