WaterFutures EPyT-Flow up to 0.16.0 REST API deserialization

Summaryinfo

A vulnerability, which was classified as critical, was found in WaterFutures EPyT-Flow up to 0.16.0. The impacted element is an unknown function of the component REST API. Such manipulation leads to deserialization. This vulnerability is referenced as CVE-2026-25632. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in WaterFutures EPyT-Flow up to 0.16.0. It has been rated as critical. Affected by this issue is some unknown functionality of the component REST API. The manipulation with an unknown input leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is confidentiality, integrity, and availability. CVE summarizes:

EPyT-Flow is a Python package designed for the easy generation of hydraulic and water quality scenario data of water distribution networks. Prior to 0.16.1, EPyT-Flow’s REST API parses attacker-controlled JSON request bodies using a custom deserializer (my_load_from_json) that supports a type field. When type is present, the deserializer dynamically imports an attacker-specified module/class and instantiates it with attacker-supplied arguments. This allows invoking dangerous classes such as subprocess.Popen, which can lead to OS command execution during JSON parsing. This also affects the loading of JSON files. This vulnerability is fixed in 0.16.1.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-25632 since 02/04/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 0.16.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-5576). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• WaterFutures

Name

• EPyT-Flow

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16.0

Website

• Product: https://github.com/WaterFutures/EPyT-Flow/

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Once again VulDB remains the best source for vulnerability data.

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