Uncontrolled Recursion Affecting deepmerge-ts package, versions <8.0.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-DEEPMERGETS-18912249
- published18 Aug 2026
- disclosed17 Aug 2026
- creditJvr
Introduced: 17 Aug 2026
NewCVE-2026-40345 (opens in a new tab)How to fix?
Upgrade deepmerge-ts to version 8.0.0 or higher.
Overview
deepmerge-ts is a Deeply merge 2 or more objects respecting type information.
Affected versions of this package are vulnerable to Uncontrolled Recursion via the deepmerge and deepmergeInto functions. An attacker can cause a process crash or denial of service by supplying crafted recursive object graphs that trigger unbounded recursion and stack exhaustion.