VULNERABILITY INTELLIGENCE
CVE-2026-12644
CVSS score5.3 MEDIUM
EPSS probability0.51%
CISA KEVNot currently listed
Published2026-06-19
Last modified2026-06-23
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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.
Weakness classification
- report@snyk.io: CWE-248
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-248