IBM Langflow up to 1.10.1 SaveToFile path traversal

Summaryinfo

A vulnerability, which was classified as critical, was found in IBM Langflow up to 1.10.1. This vulnerability affects unknown code of the component SaveToFile. Such manipulation leads to path traversal. This vulnerability is documented as CVE-2026-13445. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in IBM Langflow up to 1.10.1 and classified as critical. Affected by this issue is some unknown functionality of the component SaveToFile. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. CVE summarizes:

IBM Langflow OSS 1.0.0 through 1.10.1 can allow an authenticated attacker to exploit the SaveToFile component to read and modify another user's uploaded files by specifying absolute paths pointing to victim storage locations. In append mode, the attacker's workflow reads victim file contents, appends attacker-controlled data, and uploads a copy containing victim data to the attacker's namespace (confidentiality breach). In overwrite mode, the attacker can replace victim file contents with arbitrary data (integrity breach). This breaks the storage ownership boundary between users.

The advisory is shared for download at ibm.com. This vulnerability is handled as CVE-2026-13445 since 06/26/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 07/18/2026). 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.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-45331). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• IBM

Name

• Langflow

Version

• 1.10.0
• 1.10.1

License

• commercial

Website

• Vendor: https://www.ibm.com/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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