CVE-2026-12644
ts-deepmerge Uncaught Exception
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.
INFO
Published Date :
June 19, 2026, 5 a.m.
Last Modified :
June 19, 2026, 5 a.m.
Remotely Exploit :
No
Source :
snyk
Affected Products
The following products are affected by CVE-2026-12644
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update the ts-deepmerge package to version 8.0.0 or later.
- Review and sanitize user-controlled input for prototype pollution vulnerabilities.
- Apply patches or updates from the vendor.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-12644 vulnerability anywhere in the article.