VULNERABILITY INTELLIGENCE

CVE-2026-59868

CVSS score5.3 MEDIUM
EPSS probability0.64%
CISA KEVNot currently listed
Published2026-07-08
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Description

js-yaml is a JavaScript YAML parser and dumper. From 5.0.0 before 5.2.0, when merge keys are enabled, 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 version 5.2.0.

Weakness classification

  • security-advisories@github.com: CWE-407
  • nvd@nist.gov: CWE-770

Primary references