CVE-2026-59869
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| nodeca | js-yaml | >= 3.0.0, < 3.15.0 | affected |
| nodeca | js-yaml | >= 4.0.0, < 4.3.0 | affected |
Weaknesses
- CWE-407: CWE-407: Inefficient Algorithmic Complexity
References
- https://github.com/nodeca/js-yaml/security/advisories/GHSA-52cp-r559-cp3m
- https://github.com/nodeca/js-yaml/commit/24f13e79ee1343a7e30bd6f6c9d9cdbf0ac9b2b7
- https://github.com/nodeca/js-yaml/commit/59423c6f8cdc78742ac00e25a4dd39ef16b702e4
- https://github.com/nodeca/js-yaml/releases/tag/3.15.0
- https://github.com/nodeca/js-yaml/releases/tag/4.3.0
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