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

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...

5-ifc-check-cli (=1.0.0), 7ghost (>=4.11.2 <=4.11.46) +4163 more potentially affected by CVE-2026-27942 via fast-xml-parser (>=4.0.0-beta.2 <=4.5.3)

fast-xml-parser NPM version =4.0.0-beta.2, =4.11.2, =0.1.1, =0.0.2, =1.0.1, =1.0.0, =0.0.1, =1.0.0, =0.0.1, =0.0.1, =0.0.3 and more Source cves: CVE-2026-27942 Source advisory: OSV:GHSA-FJ3W-JWP8-X2G3...

EUVD-2026-8811

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

CVE-2026-27942

A flaw was found in fast-xml-parser. A user can exploit this flaw by processing specially crafted XML data with the XML builder when the preserveOrder option is enabled. This can lead to a stack overflow, causing the application to crash and resulting in a Denial of Service DoS. Mitigation To...

firefox: thunderbird: expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing

A memory amplification vulnerability in libexpat allows attackers to trigger excessive dynamic memory allocations by submitting specially crafted XML input. A small input 250 KiB can cause the parser to allocate hundreds of megabytes, leading to denial-of-service DoS through memory exhaustion...

@activepieces/piece-amazon-s3 (>=0.5.4 <=0.5.9), @activepieces/piece-amazon-ses (>=0.0.1 <=0.1.3) +1119 more potentially affected by CVE-2026-27942 via fast-xml-parser (>=5.0.1 <=5.3.7)

fast-xml-parser NPM version =5.0.1, =0.5.4, =0.0.1, =0.5.3, =0.2.1, =13.1.4, =1.0.0, =1.9.12, =1.0.3, =1.1.31, =1.0.0, =1.7.16, =2.33.6, =3.13.0 and more Source cves: CVE-2026-27942 Source advisory: SNYK:JS-FASTXMLPARSER-15353391...

Buffer Overflow

Overview org.webjars.npm:fast-xml-parser is a Validate XML, Parse XML, Build XML without C/C++ based libraries Affected versions of this package are vulnerable to Buffer Overflow via the XMLBuilder when preserveOrder:true is set. An attacker can cause the application to crash by providing special...

5-ifc-check-cli (=1.0.0), 7ghost (>=4.11.2 <=4.11.46) +4163 more potentially affected by CVE-2026-27942 via fast-xml-parser (>=4.0.0-beta.2 <=4.5.3)

fast-xml-parser NPM version =4.0.0-beta.2, =4.11.2, =0.1.1, =0.0.2, =1.0.1, =1.0.0, =0.0.1, =1.0.0, =0.0.1, =0.0.1, =0.0.3 and more Source cves: CVE-2026-27942 Source advisory: SNYK:JS-FASTXMLPARSER-15353391...

Buffer Overflow

Overview fast-xml-parser is a Validate XML, Parse XML, Build XML without C/C++ based libraries Affected versions of this package are vulnerable to Buffer Overflow via the XMLBuilder when preserveOrder:true is set. An attacker can cause the application to crash by providing specially crafted input...

XML External Entity (XXE)

biopython is vulnerable to XML External Entity XXE. The vulnerability is due to improper handling of XML doctype declarations, which allows an attacker to inject malicious external entities and potentially read local files or access internal resources...

DEBIAN-CVE-2026-27942

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...

CVE-2026-27942

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...

CVE-2026-27942

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...

UBUNTU-CVE-2026-27942

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...

CVE-2026-27942

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...

CVE-2026-27942 fast-xml-parser has stack overflow in XMLBuilder with preserveOrder

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...

CVE-2026-27942

CVE-2026-27942 affects fast-xml-parser. Before 5.3.8, XMLBuilder with preserveOrder: true can crash with a stack overflow. The issue is fixed in 5.3.8. Workarounds include building XML with preserveOrder: false or validating input data before passing to the builder. Connected sources also referen...

CVE-2026-27942

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...

CVE-2026-27942 fast-xml-parser has stack overflow in XMLBuilder with preserveOrder

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...

DEBIAN-CVE-2026-27821

GPAC is an open-source multimedia framework. In versions up to and including 26.02.0, a stack buffer overflow occurs during NHML file parsing in src/filters/dmxnhml.c. The value of the xmlHeaderEnd XML attribute is copied from att-value into szXmlHeaderEnd1000 using strcpy without any length...