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CVE-2026-25632
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Date: February 6, 2026
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.
Severity Score
Related Resources (5)
Severity Score
Weakness Type (CWE)
Deserialization of Untrusted Data
CWE-502Top Fix
Upgrade Version
Upgrade to version epyt-flow - 0.16.1;https://github.com/WaterFutures/EPyT-Flow.git - v0.16.1
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | NONE |
| User Interaction (UI): | NONE |
| Scope (S): | CHANGED |
| Confidentiality (C): | HIGH |
| Integrity (I): | HIGH |
| Availability (A): | HIGH |