EUVD-2026-87845
GHSA-m8hq-fmc4-c3v2
Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attacker supplies a malicious file needing no privileges (PR:N) but a victim must load it locally, so AV:L and UI:R; unrestricted pickle yields full code execution (C/I/A:H).
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
5Blast Radius
ecosystem impact- 1 pypi packages depend on monai (1 direct, 0 indirect)
Ecosystem-wide dependent count for version 1.6.0.
DescriptionCVE.org
MONAI versions before 1.6.0 contain a remote code execution vulnerability in the algo_from_pickle() function due to unsafe pickle.loads() deserialization in monai/auto3dseg/utils.py. Attackers can craft malicious pickle files that execute arbitrary system commands when deserialized by the vulnerable function.
Articles & Coverage 1
AnalysisAI
Deserialization of attacker-controlled pickle data in MONAI's Auto3DSeg module (monai/auto3dseg/utils.py) lets code run inside any process that calls algo_from_pickle() on a file the attacker can supply or substitute, with full read/write/execute impact on that process and its data. Versions before 1.6.0 are affected (pip package monai < 1.6.0, CPE cpe:2.3:a:project-monai:monai); the vulnerable pickle.loads() at line 321 fires before any isinstance or key checks, so no special configuration flag is needed to reach the sink. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that a MONAI application or Auto3DSeg pipeline call algo_from_pickle() (in monai/auto3dseg/utils.py) with a file path the attacker can control or substitute - typically via exchange of algorithm bundles or model checkpoints. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but conditionally-gated deserialization RCE (CWE-502). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to MONAI 1.6.0 or later (for example pip install --upgrade 'monai>=1.6.0'), which is the release containing the actual fix for the unsafe pickle.loads() calls in monai/auto3dseg/utils.py; do not treat v1.5.2 as remediated, because GHSA-89gg-p5r5-q6r4's claimed patch was never implemented and 1.5.2 remains exploitable. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running MONAI versions before 1.6.0 (pip package monai < 1.6.0) and inventory any use of the Auto3DSeg module's algo_from_pickle() function. …
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External POC / Exploit Code
Leaving vuln.today