Unsafe deserialisation in the PKI implementation scheme of NVFlare
Impact
NVFLARE contains a vulnerability in its PKI implementation module, where The CA credentials are transported via pickle and no safe deserialization. The deserialization of Untrusted Data may allow an unprivileged network attacker to cause Remote Code Execution, Denial Of Service, and Impact to both Confidentiality and Integrity. All versions before 2.1.2 are affected.
CVSS Score = 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Patches
The patch will be included in nvflare==2.1.2
Workarounds
Replace pickle serialization with JSON and change the code accordingly
Additional information Issue Found by: Oliver Sellwood (@Nintorac)
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | nvflare | < 2.1.2 | 2.1.2 |
References
- https://github.com/NVIDIA/NVFlare/security/advisories/GHSA-rcxc-3w2m-mp8h
- https://nvd.nist.gov/vuln/detail/CVE-2022-31604
- https://github.com/NVIDIA/NVFlare/commit/fd018eea9dff925a765079a94c2f017920fcda67
- https://github.com/NVIDIA/NVFlare
- https://github.com/pypa/advisory-database/tree/main/vulns/nvflare/PYSEC-2022-231.yaml
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-502- Platform
- Python (PyPI)
- Package
nvflare- Disclosed
- 22.06.2022
- Updated
- 11.10.2026 13:19
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2022-231 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-rcxc-3w2m-mp8h - CC BY 4.0
Vulnerability history: nvflare
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 5
- First → latest
- 03.2022 04.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 4
- High 1
Disclosures per year
- 2022: 4
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 1
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Unsafe deserialisation in the PKI implementation scheme of NVFlare this entry
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