CVE-2026-73231 Faker: helpers.fake exploitable into arbritary code execution
Attacker-controlled templates in Faker's helpers.fake method allow arbitrary JavaScript code execution via Function constructor access.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-73231?
CVE-2026-73231 is a high-severity code injection vulnerability in faker-js faker, published on 11 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Faker generates massive amounts of fake data in the browser and Node.js. Prior to 10.5.0, the faker.helpers.fake method in src/modules/helpers/eval.ts allows attacker-controlled fake templates to access the Function constructor through fakeEval.resolveProperty when a function returns another function, enabling arbitrary JavaScript code execution. This issue is fixed in version 10.5.0.
Weakness: CWE-95
Which versions are affected by CVE-2026-73231?
2 open source packages ship an affected version, including @faker-js/faker.
| Package | Affected | Fixed in |
|---|---|---|
@faker-js/faker npm | All versions | 10.5.0 |
@faker-js/faker npm | All versions | 10.5.0 |
How do I fix CVE-2026-73231?
Upgrade @faker-js/faker to 10.5.0 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-73231 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73231 exists.
Sources
Also known as CLSA-2026-1793299902, CLSA-2026-1793301523, GHSA-qxc2-j82w-r537, ROOT-APP-NPM-CVE-2026-73231.