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NVD Vulnerability Details :
CVE-2026-59868
Analyzed
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-08 Jul, 2026 | 16:16
Updated At-13 Jul, 2026 | 15:06

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Primary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A
Type: Secondary
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
Type: Primary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches
nodeca
nodeca
>>js-yaml>>Versions from 5.0.0(inclusive) to 5.2.0(exclusive)
cpe:2.3:a:nodeca:js-yaml:*:*:*:*:*:node.js:*:*
Weaknesses
CWE IDTypeSource
CWE-407Secondarysecurity-advisories@github.com
CWE-770Primarynvd@nist.gov
CWE ID: CWE-407
Type: Secondary
Source: security-advisories@github.com
CWE ID: CWE-770
Type: Primary
Source: nvd@nist.gov
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/nodeca/js-yaml/commit/3105455b81dee69e0fd36e09ac0b2ccfdb54adc1security-advisories@github.com
Patch
https://github.com/nodeca/js-yaml/releases/tag/5.2.0security-advisories@github.com
Release Notes
https://github.com/nodeca/js-yaml/security/advisories/GHSA-g796-fgmg-93mvsecurity-advisories@github.com
Exploit
Vendor Advisory
https://github.com/nodeca/js-yaml/security/advisories/GHSA-g796-fgmg-93mv134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit
Vendor Advisory
Hyperlink: https://github.com/nodeca/js-yaml/commit/3105455b81dee69e0fd36e09ac0b2ccfdb54adc1
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/nodeca/js-yaml/releases/tag/5.2.0
Source: security-advisories@github.com
Resource:
Release Notes
Hyperlink: https://github.com/nodeca/js-yaml/security/advisories/GHSA-g796-fgmg-93mv
Source: security-advisories@github.com
Resource:
Exploit
Vendor Advisory
Hyperlink: https://github.com/nodeca/js-yaml/security/advisories/GHSA-g796-fgmg-93mv
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
Exploit
Vendor Advisory
Change History
0Changes found
Details not found