CVE-2025-47771
PowSyBl Core allows deserialization of untrusted SparseMatrix data
Description
### Impact _What kind of vulnerability is it? Who is impacted?_ This is a disclosure for a security vulnerability in the `SparseMatrix` class. The vulnerability is a deserialization issue that can lead to a wide range of privilege escalations depending on the circumstances. The problematic area is the `read` method of the `SparseMatrix` class. This method takes in an `InputStream` and returns a `SparseMatrix` object. We consider this to be a method that can be exposed to untrusted input in at least two use cases: - A user can adopt this method in an application where users can submit an `InputStream` and the application parses it into a `SparseMatrix`. This can be a multi-tenant application that hosts many different users perhaps with different privilege levels. - A user adopts the method for a local tool but receives the `InputStream` from external sources. #### Am I impacted? You are vulnerable if you import non-controlled serialized `SparseMatrix` objects. ### Patches com.powsybl:powsybl-math:6.7.2 and higher ### Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_ Do not use `SparseMatrix` deserialization (`SparseMatrix.read(...)` methods). ### References [powsybl-core v6.7.2](https://github.com/powsybl/powsybl-core/releases/tag/v6.7.2)
How to fix CVE-2025-47771
To remediate CVE-2025-47771, upgrade the affected package to a fixed version below.
- —upgrade to 6.7.2 or later
Is CVE-2025-47771 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 6.3.0, < 6.7.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | 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 |