WaratekVRT Sign in

CVE-2021-26707 merge-deep

Affected softwaremerge-deep
Severity9.8 Critical CVSS 3.1 2 scores
WeaknessCWE-1321
Published2 Jun 2021
Updated17 Jun 2026

Description

The merge-deep library before 3.0.3 for Node.js can be tricked into overwriting properties of Object.prototype or adding new properties to it. These properties are then inherited by every object in the program, thus facilitating prototype-pollution attacks against applications using this library.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 5 years ago.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment no assessment published
  • Indexed PoC none indexed
  • EPSS 1.9% chance in 30 days

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

  • Protection none
  • Action not pursued none
  • Review automated Upstream data
  • Record active
Decided by The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached
Finding This CVE names only products the Waratek agent cannot be installed into (netapp/e-series_performance_analyzer). They ship as sealed appliance images or as native code with no application JVM, so there is no start-up line to add -javaagent to. The vulnerability may well be a Java one; it is permanently out of ARMR's reach rather than outside its subject.

CVSS

9.8 CRITICAL v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H NVD Primary published
CVSS 2.0 7.5 none AV:N/AC:L/Au:N/C:P/I:P/A:P NVD Primary

Affected software and releases

Products and versions

2 products, 2 version entries
SourceVendorProductSchemeAffected versions
nvd merge-deep project merge-deep generic < 3.0.3
nvd netapp e-series performance analyzer generic any version

References

URLTags
https://github.com/jonschlinkert/merge-deep/commit/11e5dd56de8a6aed0b1ed022089dbce6968d82a5 Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210716-0008/ Third Party Advisory
https://securitylab.github.com/advisories/GHSL-2020-160-merge-deep/ Third Party Advisory
https://www.npmjs.com/package/merge-deep Product, Third Party Advisory

Timeline

Published2021-06-02By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.