Bug 2498114 (CVE-2026-59868) - CVE-2026-59868 js-yaml: js-yaml: Denial of Service via quadratic CPU time parsing with merge keys
Summary: CVE-2026-59868 js-yaml: js-yaml: Denial of Service via quadratic CPU time par...
Keywords:
Status: NEW
Alias: CVE-2026-59868
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2498474
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-08 16:01 UTC by OSIDB Bzimport
Modified: 2026-07-09 11:10 UTC (History)
172 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-07-08 16:01:24 UTC 
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.
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