Unsafe yaml deserialization in NVFlare

CRITICAL 9.8CVE-2022-31605 · GHSA-hrf3-622q-8366 · PYSEC-2022-232 · Published 01/07/2022 · updated 17/06/2026

Package	Affected versions	Patched versions
nvflare PyPI	`< 2.1.2`	`2.1.2`
nvflare nvidia	`< 2.1.2`	`2.1.2`

Description

Impact

NVFLARE contains a vulnerability in its utils module, where YAML files are loaded via yaml.load() instead of yaml.safe_load(). 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

Change yaml.load() to yaml.safe_load()

Additional information

Issue Found by: Oliver Sellwood (@Nintorac)

NVD description

NVFLARE, versions prior to 2.1.2, contains a vulnerability in its utils module, where YAML files are loaded via yaml.load() instead of yaml.safe_load(). 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.

References

NVIDIA/NVFlare security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2022-31605 · ADVISORY
NVIDIA/NVFlare commit 4de9782 · WEB
NVIDIA/NVFlare · PACKAGE
pypa/advisory-database · WEB

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Scan my site free