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EUVD-2026-362072

fkie_cve-2026-55673

PowSyBl (Power System Blocks) is a framework to build power system oriented software. Prior to 7.2.2, UnixLocalCommandExecutor and WindowsLocalCommandExecutor concatenate command arguments and environment variables into strings interpreted through bash -c or cmd /c without sufficient escaping. Attacker-controlled values reaching UnixLocalCommandExecutor.execute, WindowsLocalCommandExecutor.execute, LocalComputationManager.execute, ParallelLoadFlowActionSimulator.run, ActionSimulatorTool.run, AmplModelRunner.run, or AmplModelRunner.runAsync can break out of the intended command and execute arbitrary shell commands as the JVM user. The affected itools paths include action-simulator with task-count, security-analysis with external, and dynamic-security-analysis. Downstream CLI tools, libraries, REST front ends, and multi-tenant grid-analysis services that forward less-trusted contingency identifiers or computation parameters into these APIs can expose the injection remotely. This issue is fixed in version 7.2.2.

GHSA-jqvf-j3ww-r8c7 — PowSyBl Core has Command Injection in LocalCommandExecutor-s

Affected: Maven: com.powsybl:powsybl-computation-local

### Impact

#### Description Both `AbstractLocalCommandExecutor` OS-dependent implementations are subject to **CWE-78** (OS Command Injection), with a secondary **CWE-88** (Argument Injection) concern via environment variables.

The local command executor build command strings via concatenation and executes them (through `bash -c` for Unix, or `cmd /c` for Windows). Any string argument or environment variable value reaching this executor can break out of the intended command and execute arbitrary shell code as the JVM user.

The sink is reachable through public APIs that accept `List<String>` arguments without any documented indication that elements undergo shell interpretation.

Any caller — CLI, library integration, or embedding service — that forwards data from a less-trusted source into these APIs inherits the vulnerability.

#### Vulnerable elements The vulnerable elements are: - Public methods: - `UnixLocalCommandExecutor.execute(...)` - `WindowsLocalCommandExecutor.execute(...)` - `LocalComputationManager.execute(...)` - `ParallelLoadFlowActionSimulator.run(...)` - `ActionSimulatorTool.run(...)` - `AmplModelRunner.run(...)` - `AmplModelRunner.runAsync(...)` - **itools** commands: - `action-simulator`, when the `task-count` option is defined - `security-analysis`, when the `external` option is defined - `dynamic-security-analysis`

#### Characteristics

The vulnerability characteristics are the following: - It allows **arbitrary shell command exec…