CVE-2026-94091 piskvorky gensim Model Loader utils.py load deserialization
Remote attackers can execute arbitrary code via unsafe pickle deserialization in the gensim model loader, requiring immediate mitigation as no official fix is available.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-94091?
CVE-2026-94091 is a medium-severity unsafe deserialization vulnerability in piskvorky gensim, published on 20 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Which versions are affected by CVE-2026-94091?
How do I fix CVE-2026-94091?
No fix has been published for CVE-2026-94091 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-94091 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-94091 exists.
Sources
Also known as GHSA-9h85-xr59-9fh8.