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CVE Vulnerability Details :
CVE-2026-59868
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-08 Jul, 2026 | 15:18
Updated At-09 Jul, 2026 | 13:42
Rejected At-
▼CVE Numbering Authority (CNA)
js-yaml: YAML merge-key chains can force quadratic CPU consumption

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.

Affected Products
Vendor
nodeca
Product
js-yaml
Versions
Affected
  • >= 5.0.0, < 5.2.0
Problem Types
TypeCWE IDDescription
CWECWE-407CWE-407: Inefficient Algorithmic Complexity
Type: CWE
CWE ID: CWE-407
Description: CWE-407: Inefficient Algorithmic Complexity
Metrics
VersionBase scoreBase severityVector
3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/nodeca/js-yaml/security/advisories/GHSA-g796-fgmg-93mv
x_refsource_CONFIRM
https://github.com/nodeca/js-yaml/commit/3105455b81dee69e0fd36e09ac0b2ccfdb54adc1
x_refsource_MISC
https://github.com/nodeca/js-yaml/releases/tag/5.2.0
x_refsource_MISC
Hyperlink: https://github.com/nodeca/js-yaml/security/advisories/GHSA-g796-fgmg-93mv
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/nodeca/js-yaml/commit/3105455b81dee69e0fd36e09ac0b2ccfdb54adc1
Resource:
x_refsource_MISC
Hyperlink: https://github.com/nodeca/js-yaml/releases/tag/5.2.0
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/nodeca/js-yaml/security/advisories/GHSA-g796-fgmg-93mv
exploit
Hyperlink: https://github.com/nodeca/js-yaml/security/advisories/GHSA-g796-fgmg-93mv
Resource:
exploit
Details not found