- Description
- deepmerge-ts is a typescript library providing functionality to deep merging of javascript objects. Prior to 8.0.0, the deepmerge, deepmergeCustom, deepmergeInto, and deepmergeIntoCustom APIs do not track visited objects or object pairs when recursively merging records. When two input values contain self-references at the same property path, the merge logic repeatedly revisits the same pair until Node.js raises RangeError: Maximum call stack size exceeded. Applications that merge attacker-controlled recursive object graphs can synchronously crash the affected process or cause repeated worker restarts. Plain JSON input alone cannot create the recursive graph required to trigger the issue. This issue is fixed in version 8.0.0.
- Source
- security-advisories@github.com
- NVD status
- Received
CVSS 4.0
- Type
- Secondary
- Base score
- 8.2
- Impact score
- -
- Exploitability score
- -
- Vector string
- CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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
- Severity
- HIGH
- security-advisories@github.com
- CWE-674
- Hype score
- Not currently trending
🚨*CVE* CVE-2026-40345 deepmerge-ts is a typescript library providing functionality to deep merging of javascript objects. Prior to 8.0.0, the deepmerge, deepmergeCustom, deepmergeInto, and… https://t.co/9vmHX2w0P9 ----- Traducción: CVE-2026-40345 dee… https://t.co/bYtskK
@infoflowcloud
20 Aug 2026
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Just got CVE-2026-40345 in `deepmerge-ts` It is a small vulnerability but cool to check out! https://t.co/a8uDuLZ3Pm I will be publishing a writeup soon on my github at https://t.co/lhOh4UWLes (Don't forget to follow me :) #cve #0day #vulnerability #TS https://t.co/zr2sk3W3dD
@joshuabuilds_
16 Aug 2026
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