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High severity7.3NVD Advisory· Published Feb 18, 2021· Updated Jun 17, 2026

CVE-2020-28499

CVE-2020-28499

Description

All versions of package merge are vulnerable to Prototype Pollution via _recursiveMerge .

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
mergenpm	< 2.1.1	2.1.1

Affected products

2

merge/mergedescription
ghsa-coords
pkg:npm/merge
Range: < 2.1.1

Patches

Vulnerability mechanics

References

9

github.com/advisories/GHSA-7wpw-2hjm-89gpghsaADVISORY
nvd.nist.gov/vuln/detail/CVE-2020-28499ghsaADVISORY
vuldb.comnvdThird Party AdvisoryWEB
github.com/yeikos/js.merge/blob/56ca75b2dd0f2820f1e08a49f62f04bbfb8c5f8f/src/index.tsghsaWEB
github.com/yeikos/js.merge/blob/master/src/index.tsghsaWEB
github.com/yeikos/js.merge/blob/master/src/index.ts%23L64nvdBroken Link
github.com/yeikos/js.merge/commit/7b0ddc2701d813f2ba289b32d6a4b9d4cc235fb4ghsaWEB
snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1071049nvdBroken LinkWEB
snyk.io/vuln/SNYK-JS-MERGE-1042987nvdBroken LinkWEB

News mentions

0

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