GHSA-fj3w-jwp8-x2g3Published

fast-xml-parser has stack overflow in XMLBuilder with preserveOrder

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cve-program · CVE-2026-27942

Published

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.

Source published: 26 Feb 2026 01:22:11 UTC
Source modified: 23 Jun 2026 15:50:01 UTC
Saved here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · 2.7 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

euvd · EUVD-2026-8811

Published

Additional publisher context

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Feb 26, 2026, 1:22:11 AM

dateUpdated: Jun 23, 2026, 3:50:01 PM

10 related source bulletins · separate from aliases

RHSA-2026:41944: Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.19.20 security, enhancement & bug fix update

CVE-2025-12816 · CVE-2025-13465 · CVE-2025-15284 · CVE-2025-66031 · CVE-2025-68157 · CVE-2025-68458 · CVE-2025-69873 · CVE-2026-4800 · CVE-2026-25128 · CVE-2026-25896 · CVE-2026-26278 · CVE-2026-26996 · CVE-2026-27904 · CVE-2026-27942 · CVE-2026-29063 · CVE-2026-33036 · CVE-2026-33186 · CVE-2026-34986 · CVE-2026-48779

RHSA-2026:7128: Red Hat Security Advisory: RHACS 4.9.5 security and bug fix update

CVE-2026-25128 · CVE-2026-25535 · CVE-2026-25755 · CVE-2026-25896 · CVE-2026-25940 · CVE-2026-26278 · CVE-2026-27942 · CVE-2026-31898 · CVE-2026-31938 · CVE-2026-33036 · CVE-2026-33186

RHSA-2026:41941: Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.18.25 security, enhancement & bug fix update

CVE-2025-12816 · CVE-2025-13465 · CVE-2025-15284 · CVE-2025-47907 · CVE-2025-58183 · CVE-2025-61726 · CVE-2025-61729 · CVE-2025-66031 · CVE-2025-68157 · CVE-2025-68458 · CVE-2025-69873 · CVE-2026-4800 · CVE-2026-25896 · CVE-2026-26278 · CVE-2026-26996 · CVE-2026-27904 · CVE-2026-27942 · CVE-2026-29063 · CVE-2026-33036 · CVE-2026-33186 · CVE-2026-34986 · CVE-2026-48779

RHSA-2026:51349: Red Hat Security Advisory: General availability of the satellite/iop-host-inventory-frontend-rhel9 container image

CVE-2026-13149 · CVE-2026-13676 · CVE-2026-25128 · CVE-2026-25896 · CVE-2026-26278 · CVE-2026-26996 · CVE-2026-27904 · CVE-2026-27942 · CVE-2026-33036 · CVE-2026-44990

RHSA-2026:6174: Red Hat Security Advisory: Red Hat Developer Hub 1.8.5 release.

CVE-2025-61140 · CVE-2026-2359 · CVE-2026-3304 · CVE-2026-3520 · CVE-2026-24046 · CVE-2026-25153 · CVE-2026-25639 · CVE-2026-25896 · CVE-2026-26278 · CVE-2026-27606 · CVE-2026-27942 · CVE-2026-33186

RHSA-2026:6802: Red Hat Security Advisory: Red Hat Developer Hub 1.9.3 release.

CVE-2025-61140 · CVE-2025-69873 · CVE-2026-1615 · CVE-2026-2359 · CVE-2026-3304 · CVE-2026-3520 · CVE-2026-24046 · CVE-2026-25153 · CVE-2026-25639 · CVE-2026-25679 · CVE-2026-25896 · CVE-2026-26278 · CVE-2026-27606 · CVE-2026-27942 · CVE-2026-33186

RHSA-2026:12277: Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.20.10 security, enhancement & bug fix update

CVE-2026-4800 · CVE-2026-27942 · CVE-2026-33036 · CVE-2026-33186 · CVE-2026-34986

RHSA-2026:40984: Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.20.15 security, enhancement & bug fix update

CVE-2025-12816 · CVE-2025-13465 · CVE-2025-15284 · CVE-2025-66031 · CVE-2025-68157 · CVE-2025-68458 · CVE-2025-69873 · CVE-2026-4800 · CVE-2026-22029 · CVE-2026-25128 · CVE-2026-25896 · CVE-2026-26278 · CVE-2026-26996 · CVE-2026-27904 · CVE-2026-27942 · CVE-2026-29063 · CVE-2026-33036 · CVE-2026-33186 · CVE-2026-33815 · CVE-2026-33816 · CVE-2026-34986 · CVE-2026-48779

RHSA-2026:7110: Red Hat Security Advisory: RHACS 4.8.10 security and bug fix update

CVE-2026-25128 · CVE-2026-25535 · CVE-2026-25755 · CVE-2026-25896 · CVE-2026-25940 · CVE-2026-26278 · CVE-2026-27942 · CVE-2026-29074 · CVE-2026-31898 · CVE-2026-31938 · CVE-2026-33036 · CVE-2026-33186

sca-2026-0014: Fast-xml-parser vulnerabilities affect Sentio Creator Extension 'Device Manager'

CVE-2026-27942 · CVE-2026-25896 · CVE-2026-26278

Source published: Feb 26, 2026, 1:22:11 AM (timezone not stated)
Source modified: Jun 23, 2026, 3:50:01 PM (timezone not stated)
Saved here: 15 Nov 2026 09:27:41 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

EUVD CVSS 4.0 · 2.7 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

nvd · CVE-2026-27942

Published

Additional publisher context

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-120

Original publisher date fields

published: 2026-02-26T02:16:22.357

lastModified: 2026-06-17T10:27:56.887

1 source CPE criteria · context only

cpe:2.3:a:naturalintelligence:fast-xml-parser:*:*:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 26 Feb 2026 02:16:22 UTC
Source modified: 17 Jun 2026 10:27:56 UTC
Saved here: 25 Oct 2026 06:17:33 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · [email protected] · Secondary · 2.7 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS 3.1 · [email protected] · Primary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

osv · GHSA-fj3w-jwp8-x2g3

Published

### Impact Application crashes with stack overflow when user use XML builder with `prserveOrder:true` for following or similar input ``` [{ 'foo': [ { 'bar': [{ '@_V': 'baz' }] } ] }] ``` Cause: `arrToStr` was not validating if the input is an array or a string and treating all non-array values as text content. _What kind of vulnerability is it? Who is impacted?_ ### Patches Yes in 5.3.8 ### Workarounds Use XML builder with `preserveOrder:false` or check the input data before passing to builder. ### References [_Are there any links users can visit to find out more?_](https://github.com/NaturalIntelligence/fast-xml-parser/pull/791)

Source published: 26 Feb 2026 22:33:10 UTC
Source modified: 10 Sep 2026 03:50:34 UTC
Saved here: 24 Oct 2026 13:17:17 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

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

Publisher rating · LOW