CVE-2023-30857: @aedart/support possibly vulnerable to prototype pollution in metadata record, when using meta decorator

Severity: low (CVSS 3.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-04-28 · updated 2026-06-17
Weakness: CWE-1321

Description

@aedart/support is the support package for Ion, a monorepo for JavaScript/TypeScript packages. Prior to version `0.6.1`, there is a possible prototype pollution issue for the `MetadataRecord`, when merged with a base class' metadata object, in `meta` decorator from the `@aedart/support` package. The likelihood of exploitation is questionable, given that a class's metadata can only be set or altered when the class is decorated via `meta()`. Furthermore, object(s) of sensitive nature would have to be stored as metadata, before this can lead to a security impact. The issue has been patched in version `0.6.1`.

Affected products

aedart ion: before 0.6.1 — fixed in 0.6.1

How to fix

Upgrade to a fixed version: aedart ion 0.6.1. Check the vendor advisory for mitigations.

References

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