Inefficient Algorithmic Complexity Affecting js-yaml package, versions >=3.0.0 <3.15.1>=4.0.0 <4.3.1
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Test your applications- Snyk IDSNYK-JS-JSYAML-18593780
- published8 Aug 2026
- disclosed6 Aug 2026
- credit0xsharz
Introduced: 6 Aug 2026
New CVE NOT AVAILABLE CWE-407 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade js-yaml to version 3.15.1, 4.3.1 or higher.
Overview
js-yaml is a human-friendly data serialization language.
Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity through the yaml.load process. An attacker can cause excessive CPU consumption and block the event loop by providing a specially crafted YAML document containing a large !!omap sequence.