Security Advisory

CVE-2026-59870

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-08 15:13:20

Last updated 2026-07-08 15:50:55

Assigner GitHub_M

CVSS score 5.3

State PUBLISHED

Description

js-yaml is a JavaScript YAML parser and dumper. From 5.0.0 before 5.2.1, YAML11_SCHEMA support for the !!omap tag in src/tag/sequence/omap.ts uses omapTag.addItem() to perform a linear duplicate-key scan on every insertion, causing O(n^2) CPU consumption when yaml.load() parses a crafted ordered-map document. This issue is fixed in version 5.2.1.

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