IBM Langflow up to 1.10.0 Flow filename path traversal

Summaryinfo

A vulnerability categorized as critical has been discovered in IBM Langflow up to 1.10.0. The affected element is an unknown function of the component Flow Handler. The manipulation of the argument filename results in path traversal. This vulnerability was named CVE-2026-7667. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in IBM Langflow up to 1.10.0. It has been classified as critical. Affected is an unknown functionality of the component Flow Handler. The manipulation of the argument filename with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-23. The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

IBM Langflow OSS 1.0.0 through 1.10.0 allows an authenticated attacker to create a malicious flow pointing to an attacker-controlled URL that returns a specially crafted Content-Disposition header (e.g., filename="../../../target/path" ), enabling arbitrary file write operations with attacker-controlled content to any path accessible by the Langflow process.

The advisory is shared for download at ibm.com. This vulnerability is traded as CVE-2026-7667 since 05/01/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 07/17/2026). The MITRE ATT&CK project declares the attack technique as T1006.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• IBM

Name

• Langflow

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10.0

License

• commercial

Website

• Vendor: https://www.ibm.com/

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