CVE-2026-27942

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Source
https://cve.org/CVERecord?id=CVE-2026-27942
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-27942.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-27942
Aliases
Downstream
Related
Published
2026-02-26T01:22:11.383Z
Modified
2026-06-24T03:53:14.740133870Z
Severity
  • 2.7 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U CVSS Calculator
Summary
fast-xml-parser has stack overflow in XMLBuilder with preserveOrder
Details

fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. Prior to version 5.3.8, the application crashes with stack overflow when user use XML builder with preserveOrder:true. Version 5.3.8 fixes the issue. As a workaround, use XML builder with preserveOrder:false or check the input data before passing to builder.

Database specific 
{
    "cwe_ids": [
        "CWE-120"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27942.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/naturalintelligence/fast-xml-parser

Affected ranges

Type
GIT
Repo
https://github.com/naturalintelligence/fast-xml-parser
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
d4eb6b4713a8d11e6730943392419040898ecbc0
Introduced
2f7d138af8338aaf65c1d98902f76259c7233373
Fixed
c692040f6b5f5045d38b66b1da04e4d3abc97052
Fixed
c13a961910f14986295dd28484eee830fa1a0e8a
Database specific 
{
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.5.4"
        },
        {
            "introduced": "5.0.0"
        },
        {
            "fixed": "5.3.8"
        }
    ],
    "cpe": "cpe:2.3:a:naturalintelligence:fast-xml-parser:*:*:*:*:*:*:*:*"
}

Affected versions

2.*
2.9.3
2.9.4
3.*
3.0.0
3.10.0
3.12.16
3.12.5
3.13.0
3.14.0
3.16.0
3.17.1
3.17.5
3.18.0
3.19.0
3.2.0
3.4.0
v3.*
v3.15.0
v3.20.0
v3.20.1
v3.20.2
v3.20.3
v3.21.0
v3.21.1
v4.*
v4.0.0
v4.0.0-beta.0
v4.0.0-beta.2
v4.0.0-beta.3
v4.0.0-beta.4
v4.0.0-beta.5
v4.0.0-beta.6
v4.0.1
v4.0.10
v4.0.11
v4.0.12
v4.0.13
v4.0.14
v4.0.15
v4.0.2
v4.0.4
v4.0.5
v4.0.6
v4.0.7
v4.0.8
v4.0.9
v4.1.0
v4.1.1
v4.1.2
v4.1.3
v4.1.4
v4.2.0
v4.2.3
v4.2.4
v4.2.5
v4.2.6
v4.2.7
v4.3.0
v4.3.1
v4.3.2
v4.3.3
v4.3.4
v4.3.5
v4.3.6
v4.4.0
v4.4.1
v4.5.0
v4.5.1
v4.5.2
v4.5.3
v5.*
v5.0.0
v5.0.2
v5.0.4
v5.0.6
v5.0.7
v5.0.9
v5.1.0
v5.2.0
v5.2.1
v5.2.2
v5.2.3
v5.2.5
v5.3.0
v5.3.1
v5.3.2
v5.3.3
v5.3.4
v5.3.5
v5.3.6
v5.3.7

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-27942.json"