CVE-2026-12644 (GCVE-0-2026-12644)
Vulnerability from cvelistv5 – Published: 2026-06-19 05:00 – Updated: 2026-06-22 15:03
VLAI
EPSS
VEX
Summary
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.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-22 15:02 UTC
CWE
- CWE-248 - Uncaught Exception
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| n/a | ts-deepmerge |
Affected:
0 , < 8.0.0
(semver)
|
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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