EPyT-Flow vulnerable to unsafe JSON deserialization (type)

NGHIÊM TRỌNG 10.0CVE-2026-25632 · GHSA-74vm-8frp-7w68 · PYSEC-2026-330 · Công bố 06/02/2026 · cập nhật 17/06/2026

Tóm tắt nhanh

CVE-2026-25632 là lỗ hổng mức NGHIÊM TRỌNG (CVSS 10.0) ảnh hưởng epyt-flow, epyt-flow (waterfutures).
Xác suất bị khai thác trong 30 ngày tới (EPSS): 0.81%, cao hơn 56.8% các lỗ hổng khác.
Cách xử lý: cập nhật lên 0.16.1 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
epyt-flow PyPI	`< 0.16.1`	`0.16.1`
epyt-flow waterfutures	`< 0.16.1`	`0.16.1`

Mô tả

Impact

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.

Patches

EPyT-Flow has been patched in 0.16.1 -- affects all versions <= 0.16.0

Workarounds

Do not load any JSON from untrusted sources and do not expose the REST API.

Credits

EPyT-Flow thanks Jarrett Chan (@syphonetic) for detecting and reporting the bug.

Mô tả của NVD

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.