CVE-2026-94091Public exploitNetwork attack vector

Code execution via unrestricted model-file unpickling

Published Sep 20, 2026 · Updated Sep 20, 2026

Deserialization in RARE Technologies Gensim 4.0 through 4.4.0 allows attackers to execute code through a crafted model file. SaveLoad.load passes fname to unpickle, which opens the model and invokes pickle.load without restricting classes before any mmap handling. Execution requires an application or user to load the attacker-controlled file, and commands run with the Python process's privileges.

CVSS severity5.5
Medium
EPSS probability0.34%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in RARE Technologies Gensim 4.0 through 4.4.0 allows attackers to execute code through a crafted model file. SaveLoad.load passes fname to unpickle, which opens the model and invokes pickle.load without restricting classes before any mmap handling. Execution requires an application or user to load the attacker-controlled file, and commands run with the Python process's privileges.

The record

CVE
CVE-2026-94091
Published
Sep 20, 2026
Updated
Sep 20, 2026
Vendor
RARE Technologies
Product
Gensim
Classifications
CWE-502, T1204.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0
  2. Affected versionversion=4.1
  3. Affected versionversion=4.2
  4. Affected versionversion=4.3
  5. Affected versionversion=4.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

RARE Technologies · Gensimversion=4.0; version=4.1; version=4.2; version=4.3; version=4.4.0

Published CVSS scores

5.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1204.002User Execution: Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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