# CVE-2026-94091 — piskvorky gensim

> As of 2026-09-21, CVE-2026-94091 is a MEDIUM-severity vulnerability in piskvorky gensim, CVSS v3.1 5.5, EPSS 0.1% (9.3th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-94091 as of 2026-09-21; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-21

## What is CVE-2026-94091?

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.

The record classifies CVE-2026-94091 under weakness classes [CWE-502](https://intel.threadlinqs.com/cwe/CWE-502), [CWE-20](https://intel.threadlinqs.com/cwe/CWE-20). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs a user to take an action first. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 15 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 5.5 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R`)
- **CVSS v4.0 base score:** 5.1 (`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`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 9.3% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-20, last modified 2026-09-21

## Is CVE-2026-94091 being exploited?

It currently carries a trending score of 32 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **piskvorky**: gensim

## How to fix CVE-2026-94091

No vendor patch reference has been recorded for CVE-2026-94091 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-94091

No threat campaign in the Threadlinqs corpus currently references CVE-2026-94091, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-09-22.

**Exploit and proof of concept**

- [github.com — exploit](https://github.com/piskvorky/gensim/issues/3663)

**Technical analysis**

- [vuldb.com — vdb entry](https://vuldb.com/vuln/408020)

**Third-party advisory**

- [vuldb.com — signature](https://vuldb.com/vuln/408020/cti)
- [vuldb.com — third party advisory](https://vuldb.com/cve/CVE-2026-94091)
- [vuldb.com — third party advisory (952644)](https://vuldb.com/submit/952644)

**Issue tracking and product pages**

- [github.com — product](https://github.com/piskvorky/gensim/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-94091
Full detection coverage and IOCs for threats exploiting CVE-2026-94091 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp