CVE-2026-13445Network attack vector

Cross-user file disclosure and overwrite via absolute paths

Published Jul 17, 2026 · Updated Jul 17, 2026

Authorization bypass in IBM Langflow OSS 1.0.0 through 1.10.1 allows remote authenticated users to read or overwrite other users' files. The SaveToFile component accepts an absolute path to another user's storage location without enforcing ownership, then reads and appends to the file or replaces its contents. A valid account and a crafted workflow are required; append mode discloses victim data into the attacker's namespace, while overwrite mode alters the victim's stored file.

CVSS severity8.1
High
EPSS probability0.35%
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 1.10.1 allows remote authenticated users to read or overwrite other users' files. The SaveToFile component accepts an absolute path to another user's storage location without enforcing ownership, then reads and appends to the file or replaces its contents. A valid account and a crafted workflow are required; append mode discloses victim data into the attacker's namespace, while overwrite mode alters the victim's stored file.

The record

CVE
CVE-2026-13445
Published
Jul 17, 2026
Updated
Jul 17, 2026
Vendor
IBM
Product
Langflow OSS
Classifications
CWE-639, T1005, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 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

8.1IBM CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
T1005Data from Local System
T1565.001Stored Data Manipulation

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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