EUVD-2026-83795
GHSA-9h85-xr59-9fh8
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
Pickle deserialization yields full code execution (C/I/A:H); no privileges to supply a file (PR:N), but a victim must load the malicious file (UI:R), with files commonly distributed over the network (AV:N).
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
5DescriptionCVE.org
A weakness has been identified in piskvorky gensim up to 4.4.0. The impacted element is the function Load of the file gensim/utils.py of the component Model Loader. This manipulation of the argument fname causes deserialization. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. Maintainer closed #3663 same-day with no comment, PR, or fix; repo's last push (2025-11-01) predates the report, so the unsafe pickle.load in SaveLoad.load remains unguarded at develop HEAD.
AnalysisAI
Deserialization of untrusted data in gensim's SaveLoad.load (gensim/utils.py) lets an attacker execute arbitrary code on any host that loads a crafted model file, affecting gensim versions up to and including 4.4.0 as well as the current develop HEAD. The flaw is reachable through the public model-loading API and requires the victim to load an attacker-supplied serialized model or vector file (no authentication is needed to craft or deliver the file; the assessed CVSS:3.1 vector is AV:N/AC:L/PR:N/UI:R with high confidentiality, integrity and availability impact, while the vendor-feed CVSS 4.0 score of 5.1 reflects a lower PR:L/E:P reading of the same issue). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to load an attacker-controlled serialized model file through gensim's SaveLoad.load / Load API (gensim/utils.py), which internally calls Python's unsafe pickle.load. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a classic unsafe-pickle deserialization flaw (CWE-502) in gensim's SaveLoad.load (gensim/utils.py), reachable via the public Load API. … 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 | No vendor-released patch identified at time of analysis: issue piskvorky/gensim#3663 was closed by the maintainer without a comment, PR, or fix and the unsafe pickle.load in gensim/utils.py is still unguarded at develop HEAD, so upgrading within gensim does not currently remove the flaw. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-502 – Deserialization of Untrusted Data
View allSame technique Deserialization
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External POC / Exploit Code
Leaving vuln.today