PT-2026-50839 · Npm · Ts-Deepmerge

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CVE-2026-12644

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Published

2026-06-19

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Updated

2026-06-22

CVSS v4.0

5.5

Medium

VectorAV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
Name of the Vulnerable Software and Affected Versions ts-deepmerge versions prior to 8.0.0
Description An uncaught exception occurs due to improper handling of built-in Object.prototype methods, such as toString and valueOf. When user-controlled input contains these keys with non-function values, the resulting merged object is corrupted. Consequently, any string context operation triggers a TypeError, which leads to an application crash.
Recommendations Update to version 8.0.0 or later.

Exploit

Fix

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Weakness Enumeration

Related Identifiers

CVE-2026-12644
GHSA-87MF-GV2C-C62C

Affected Products

Ts-Deepmerge