CVE-2026-109361

MONAI 1.2.0 before 1.6.1 Insecure Deserialization RCE via nnUNetV2Runner postprocessing_file Path

State: Published
Severity: 7.0 High
Published: Oct 12, 2026
Updated: Oct 26, 2026
Reserved: Oct 12, 2026

Description

MONAI 1.2.0 before 1.6.1 contains an insecure deserialization vulnerability in nnUNetV2Runner that unpickles the postprocessing_file path read from inference_information.json without confining it to the results directory. Attackers who can modify inference_information.json can point it at a malicious pickle elsewhere on the filesystem to execute code when predict_ensemble_postprocessing runs.

Scores

CVSS	Score	Vector	Source
4.0	7.0 High	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	VulnCheck
3.1	7.3 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H	VulnCheck

Weaknesses

CWE-502 Deserialization of Untrusted Data

Affected Products

Product	Versions
MONAIProject-MONAI	1.2.0 to before 1.6.1Affected 1.6.1Not affected

References

GitHub Security Advisory (GHSA-8f32-8649-rv87)vendor-advisory
Patch Commitpatch
VulnCheck Advisory: MONAI 1.2.0 before 1.6.1 Insecure Deserialization RCE via nnUNetV2Runner postprocessing_file Paththird-party-advisory

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