Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') Affecting opensearch-dashboards-2 package, versions <2.19.5-r3


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.27% (20th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-OPENSEARCHDASHBOARDS2-20416076
  • published4 Oct 2026
  • disclosed11 Jul 2026

Introduced: 11 Jul 2026

CVE-2026-56763  (opens in a new tab)
CWE-1321  (opens in a new tab)

How to fix?

Upgrade Chainguard opensearch-dashboards-2 to version 2.19.5-r3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream opensearch-dashboards-2 package and not the opensearch-dashboards-2 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Hono before 4.12.7 allows proto key in parseBody with dot option enabled, permitting specially crafted form field names to create objects with proto properties. When parsed results are merged into regular JavaScript objects using unsafe merge patterns, attackers can exploit this to achieve prototype pollution and modify object behavior.

CVSS Base Scores

version 3.1