CVE-2026-25632 | EPyT-Flow is a Python package designed for the easy generati… | CVSS 10.0 CRITICAL

Description

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.

Metadata

CVE ID: CVE-2026-25632
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-02-04 05:15 UTC
Published: 2026-02-06 20:24 UTC
Last updated: 2026-02-06 20:56 UTC
Primary CWE: CWE-502
CWE-502: Deserialization of Untrusted Data
Vendor / Product: WaterFutures / EPyT-Flow
Sources: cve.org · NVD

Severity & Metrics

10.0 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
WaterFutures	EPyT-Flow	—	< 0.16.1

Weakness (CWE)

CWE	Source	Description
CWE-502	cna	CWE-502: Deserialization of Untrusted Data

CVSS scores (1)

Score	Severity	Version	Source	Vector
10.0	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References (3)

https://github.com/WaterFutures/EPyT-Flow/security/advisories/GHSA-74vm-8frp-7w68 https://github.com/WaterFutures/EPyT-Flow/security/advisories/GHSA-74vm-8frp-7w68
https://github.com/WaterFutures/EPyT-Flow/commit/3fff9151494c7dbc72073830b734f0a7e550e385 https://github.com/WaterFutures/EPyT-Flow/commit/3fff9151494c7dbc72073830b734f0a7e550e385
https://github.com/WaterFutures/EPyT-Flow/releases/tag/v0.16.1 https://github.com/WaterFutures/EPyT-Flow/releases/tag/v0.16.1