Deserialization in Project-Monai Monai
CVE-2026-100846
MONAI before 1.5.2 contains a deserialization of untrusted data vulnerability in the algo_from_pickle function in monai/auto3dseg/utils.py. The function reads a .pkl file and passes its contents to pickle.loads without validating the data source or content. If an application invokes algo_from_pickle on an attacker-supplied pickle file, an object defining __reduce__ is executed during deserialization, resulting in arbitrary code execution in the context of the application.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (30.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-89gg-p5r5-q6r4) (vendor-advisory, Exploit, Vendor Advisory)
- VulnCheck Advisory: MONAI before 1.5.2 Remote Code Execution via Pickle Deserialization (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-100846?
- CVE-2026-100846 is a high-severity vulnerability in Project-Monai Monai, classified under Deserialization of Untrusted Data. CVSS score: 7.6/10. Published 2026-09-27.
- How severe is CVE-2026-100846?
- High severity. CVSS v3 base score is 7.6 out of 10.