What is CVE-2026-109361?

CVE-2026-109361 is a high-severity vulnerability in Project-Monai Monai, classified under Deserialization of Untrusted Data. CVSS score: 7.3/10. Published 2026-10-12.

How severe is CVE-2026-109361?

High severity. CVSS v3 base score is 7.3 out of 10.

Deserialization in Project-Monai Monai

CVE-2026-109361

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.

Vulnerability class: Insecure Deserialization

Published 2026-10-12.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Project-Monai Monai

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

github.com/Project-MONAI/MONAI/security/advisories/GHSA-8f32-8649-rv87 (vendor-advisory)
github.com/Project-MONAI/MONAI/commit/08576205c4de3c214976294d1dec8f7b2e78cdb9 (patch)
www.vulncheck.com/advisories/monai-1.2.0-before-1.6.1-insecure-deserialization-… (third-party-advisory)

Frequently asked questions

What is CVE-2026-109361?: CVE-2026-109361 is a high-severity vulnerability in Project-Monai Monai, classified under Deserialization of Untrusted Data. CVSS score: 7.3/10. Published 2026-10-12.
How severe is CVE-2026-109361?: High severity. CVSS v3 base score is 7.3 out of 10.