Prototype Pollution in deepmerge-ts

CRITICAL 9.8CVE-2022-24802 · GHSA-r9w3-g83q-m6hq · Published 01/04/2022 · updated 17/06/2026

In short

CVE-2022-24802 is a CRITICAL (CVSS 9.8) vulnerability affecting deepmerge-ts (deepmerge-ts project), deepmerge-ts.
Chance of exploitation in the next 30 days (EPSS): 1.7%, higher than 77.0% of all vulnerabilities.
Fix: update to 4.0.2 or later.

Package	Affected versions	Patched versions
deepmerge-ts deepmerge-ts_project	`< 4.0.2`	`4.0.2`
deepmerge-ts npm	`< 4.0.2`	`4.0.2`

Description

deepmerge-ts is used to merge 2 or more objects respecting type information. deepmerge-ts is vulnerable to Prototype Pollution via file deepmerge.ts, function defaultMergeRecords(). A fix was released in version 4.0.2. Currently, there is no known workaround.

NVD description

deepmerge-ts is a typescript library providing functionality to deep merging of javascript objects. deepmerge-ts is vulnerable to Prototype Pollution via file deepmerge.ts, function defaultMergeRecords(). This issue has been patched in version 4.0.2. There are no known workarounds for this issue.

References

RebeccaStevens/deepmerge-ts security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2022-24802 · ADVISORY
RebeccaStevens/deepmerge-ts commit b39f1a9 · WEB
RebeccaStevens/deepmerge-ts commit d637db7 · WEB
RebeccaStevens/deepmerge-ts · PACKAGE

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