CVE-2026-12644
MEDIUM EPSS 22.4%
Published Jun 19, 20261w ago · Modified Jun 23, 20261w ago
5.5 CVSS 4.0
Published Jun 19, 2026 1w ago
Last Modified Jun 23, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
22.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-248
References 3
- gist.github.com https://gist.github.com/igorg1312/775fa00114c4d47df6ae0551779ab407
- github.com https://github.com/voodoocreation/ts-deepmerge/commit/305a05831a462fb2c353d3cbbff55a0733286f8c
- security.snyk.io https://security.snyk.io/vuln/SNYK-JS-TSDEEPMERGE-17339141
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.