CVEvulnerability
CVE-2026-59869
7.5 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-08
- Last modified
- 2026-10-25
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-407
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.
Affected configurations
• nodeca js-yaml (>= 3.0.0 < 3.15.0)
• nodeca js-yaml (>= 4.0.0 < 4.3.0)
Related
Weakness · CWE (1)
- CWE-407 Inefficient Algorithmic Complexity weakness
References
- https://github.com/nodeca/js-yaml/commit/24f13e79ee1343a7e30bd6f6c9d9cdbf0ac9b2b7 Patch
- https://github.com/nodeca/js-yaml/commit/59423c6f8cdc78742ac00e25a4dd39ef16b702e4 Patch
- https://github.com/nodeca/js-yaml/releases/tag/3.15.0 Release Notes
- https://github.com/nodeca/js-yaml/releases/tag/4.3.0 Release Notes
- https://github.com/nodeca/js-yaml/security/advisories/GHSA-52cp-r559-cp3m Exploit, Vendor Advisory
- https://github.com/nodeca/js-yaml/security/advisories/GHSA-52cp-r559-cp3m Exploit, Vendor Advisory