CVE-2026-59869 - js-yaml: YAML merge-key chains can force quadratic CPU consumption

CVE-2026-59869 - js-yaml: YAML merge-key chains can force quadratic CPU consumption

https://cvefeed.io/rssfeed/latest.atom / Wed, 07/08/2026 - 19:04
CVE ID :CVE-2026-59869
Published : July 8, 2026, 4:16 p.m. | 29 minutes ago
Description :js-yaml is a JavaScript YAML parser and dumper. From 3.0.0 before 3.15.0 and from 4.0.0 before 4.3.0, js-yaml can spend quadratic CPU time parsing a document whose size grows only linearly when a chain of mappings uses merge keys where each mapping merges the previous one. This issue is fixed in versions 3.15.0 and 4.3.0.
Severity: 7.5 | HIGH
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