CVE-2026-12644
6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| n/a | ts-deepmerge | 0 < 8.0.0 | affected |
Weaknesses
- CWE-248: Uncaught Exception
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: yes
- Technical Impact: partial
Additional References
References
- https://security.snyk.io/vuln/SNYK-JS-TSDEEPMERGE-17339141
- https://gist.github.com/igorg1312/775fa00114c4d47df6ae0551779ab407
- https://github.com/voodoocreation/ts-deepmerge/commit/305a05831a462fb2c353d3cbbff55a0733286f8c
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