Faker: helpers.fake exploitable into arbritary code execution

### Summary `faker.helpers.fake` can be tricked into arbritary code execution. ### Details fakeEval.resolveProperty resolves properties on functions itself instead of resolving the nested function first. This can be addressed by recursively calling resolveProperty instead of accessing the property after one iteration. ### PoC Go to https://fakerjs.dev/ Open Browser console and run ````ts await enableFaker(); // or import faker faker.rawDefinitions.test = (() => () => {}); // Any function that returns a function faker.helpers.fake(`{{test.constructor(alert('PowerLevel: Eval'))}}`); ```` ### Impact The Fake method claims: > It is also NOT possible to use any non-faker methods or plain javascript in such patterns. Which is objectively false, since any global gets fully accessible in the fake string.

Source published

2 Sep 2026 14:20:14 UTC

Source modified

2 Sep 2026 14:30:05 UTC

Observed here

24 Oct 2026 13:17:17 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Publisher rating · HIGH