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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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.
    (CVE-2026-40345)

ID	Name	Product	Family	Type	Severity
473541	Echo: deepmerge-ts: security update to 8.0.0	Tenable Cloud Security	Echo Local Security Checks	Local	high
473541	Echo: deepmerge-ts: security update to 8.0.0	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
446020	SCA: security update for deepmerge-ts (GHSA-ggr8-5vv4-36mx)	Tenable Cloud Security	SCA Checks	Local	high
446020	SCA: security update for deepmerge-ts (GHSA-ggr8-5vv4-36mx)	Tenable Self-Hosted Container Security	SCA Checks	Local	high

Detections

Analytics

CVE-2026-40345

high

Tenable Plugins

high

high

high

high