7.5

CVE-2026-59869

Exploit

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

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Nodeca ≫ Js-yaml SwPlatformnode.js Version >= 3.0.0 < 3.15.0
Nodeca ≫ Js-yaml SwPlatformnode.js Version >= 4.0.0 < 4.3.0
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.42% 0.347
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-407 Inefficient Algorithmic Complexity

An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.

https://github.com/nodeca/js-yaml/security/advisories/GHSA-52cp-r559-cp3m
Vendor Advisory
Exploit
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