CVE-2026-59869

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Source
https://cve.org/CVERecord?id=CVE-2026-59869
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-59869.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-59869
Aliases
Downstream
AZL (1)
CGA (262)
CLEANSTART (17)
CLSA (5)
DEBIAN (1)
ECHO (1)
MINI (35)
openSUSE (1)
RHSA (10)
ROOT (1)
UBUNTU (1)
Related
Published
2026-07-08T15:15:54Z
Modified
2026-10-27T02:35:06Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
js-yaml: YAML merge-key chains can force quadratic CPU consumption
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59869.json"
}
References

Affected packages

Git / github.com/nodeca/js-yaml

Affected ranges

Type
GIT
Repo
https://github.com/nodeca/js-yaml
Events
Introduced
b58544b370043e30fe976aad6d62bb133325750e
Fixed
c34b6c40027a769eb0d67958ae615268a1d55f54
Introduced
ee74ce4b4800282b2f23b776be7dc95dfe34db1c
Fixed
33d05b5d29a8c21360f620f7e1c1706e24522eda
Fixed
24f13e79ee1343a7e30bd6f6c9d9cdbf0ac9b2b7
Fixed
59423c6f8cdc78742ac00e25a4dd39ef16b702e4
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:nodeca:js-yaml:*:*:*:*:*:node.js:*:*",
            "range": [
                {
                    "introduced": "3.0.0"
                },
                {
                    "fixed": "3.15.0"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "cpe": "cpe:2.3:a:nodeca:js-yaml:*:*:*:*:*:node.js:*:*",
            "range": [
                {
                    "introduced": "4.0.0"
                },
                {
                    "fixed": "4.3.0"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "range": [
                {
                    "fixed": "24f13e79ee1343a7e30bd6f6c9d9cdbf0ac9b2b7"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "59423c6f8cdc78742ac00e25a4dd39ef16b702e4"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "3.15.0",
            "range": [
                {
                    "fixed": "c34b6c40027a769eb0d67958ae615268a1d55f54"
                }
            ],
            "source": "REFERENCES_TAG"
        },
        {
            "original_tag": "4.3.0",
            "range": [
                {
                    "fixed": "33d05b5d29a8c21360f620f7e1c1706e24522eda"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

3.*
3.0.0
3.0.1
3.0.2
3.1.0
3.10.0
3.11.0
3.12.0
3.12.1
3.12.2
3.13.0
3.13.1
3.14.0
3.14.1
3.14.2
3.2.0
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
3.2.6
3.2.7
3.3.0
3.3.1
3.4.0
3.4.1
3.4.2
3.4.3
3.4.4
3.4.5
3.4.6
3.5.0
3.5.1
3.5.2
3.5.3
3.5.4
3.5.5
3.6.0
3.6.1
3.7.0
3.8.0
3.8.1
3.8.2
3.8.3
3.8.4
3.9.0
3.9.1
4.*
4.0.0
4.1.0
4.1.1
4.2.0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-59869.json"