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TI-2026-40195 Aliases CVE-2026-55673GHSA-jqvf-j3ww-r8c7

PowSyBl: Command Injection in LocalCommandExecutor-s

Priority LOW 32CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
None · Low · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-78.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00604 49th percentileScored 2026-11-07
Fix Fixed powsybl-core (powsybl): 7.2.2com.powsybl:powsybl-computation-local (Maven): 7.2.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
powsyblpowsybl-corebefore 7.2.27.2.2Patch availableCNA
—com.powsybl:powsybl-computation-local (Maven)before 7.2.27.2.2Patch availableGHSA-jqvf-j3ww-r8c7
  • powsybl-core Vendorpowsybl Affected before 7.2.2 Fixed in 7.2.2 Patch available CNA
  • com.powsybl:powsybl-computation-local (Maven) Vendor— Affected before 7.2.2 Fixed in 7.2.2 Patch available GHSA-jqvf-j3ww-r8c7

Remediation

  • Fix · CNA powsybl-core (powsybl) Fixed in 7.2.2
  • Fix · GHSA-jqvf-j3ww-r8c7 com.powsybl:powsybl-computation-local (Maven) Fixed in 7.2.2 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-55673
  2. 2026-10-03 Alias added: GHSA-jqvf-j3ww-r8c7

References

Other 6

  • TI-2025-30237 PowSyBl Core allows deserialization of untrusted SparseMatrix data CVSS 4.0HIGH 8.1
  • TI-2025-30429 PowSyBl Core contains Polynomial REDoS’es CVSS 4.0MEDIUM 6.3
  • TI-2025-30430 PowSyBl Core Contains a Polynomial ReDoS in RegexCriterion CVSS 4.0LOW 2.7
  • TI-2025-29823 PowSyBl Core XML Reader allows XXE and SSRF CVSS 4.0LOW 2.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences