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MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P
Description
Versions of the package ts-deepmerge before 8.0.0 are vulnerable to Uncaught Exception due to the improper handling of built-in Object.prototype methods (such as toString, valueOf). When user-controlled input contains these keys with non-function values, the resulting merged object becomes broken — any string context operation throws a TypeError, crashing the application.
Basic Information
ID
CVE-2026-12644
Source
snyk
Published
Jun 19, 2026 at 05:00
Affected Product
Vendor
n/a
Product
ts-deepmerge
Affected Versions
n/a ts-deepmerge 0