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...

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 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

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...

📄 fast-xml-parser REGEX Injection / Cross Site Scripting

fast-xml-parser versions starting at 4.1.3 and below 5.3.5 suffer from a REGEX injection issue that can allow for cross site scripting attacks. ============================================================================================================================================= | Title :...

CVE-2026-27942: Buffer Copy without Checking Size of Input

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...

fast-xml-parser 安全漏洞

fast-xml-parser is an open-source library developed by Natural Intelligence. It is used for quickly validating, parsing, and constructing XML files without relying on C/C++-based libraries or callbacks. Versions of fast-xml-parser prior to 5.3.8 contained a security vulnerability. This...

SUSE CVE-2026-26278

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. In versions 4.1.3 through 5.3.5, the XML parser can be forced to do an unlimited amount of entity expansion. With a very small XML input, it's possible ...

Linux Distros Unpatched Vulnerability : CVE-2026-25896

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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. From 4.1.3to...

Linux Distros Unpatched Vulnerability : CVE-2023-26920

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - fast-xml-parser before 4.1.2 allows proto for Prototype Pollution. CVE-2023-26920 Note that Nessus relies on the presence of the package as reported by the...

DEBIAN-CVE-2026-25896

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. From 4.1.3to before 5.3.5, a dot . in a DOCTYPE entity name is treated as a regex wildcard during entity replacement, allowing an attacker to shadow...

CVE-2026-25896

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. From 4.1.3to before 5.3.5, a dot . in a DOCTYPE entity name is treated as a regex wildcard during entity replacement, allowing an attacker to shadow...

UBUNTU-CVE-2026-25896

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. From 4.1.3to before 5.3.5, a dot . in a DOCTYPE entity name is treated as a regex wildcard during entity replacement, allowing an attacker to shadow...

CVE-2026-25896

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. From 4.1.3to before 5.3.5, a dot . in a DOCTYPE entity name is treated as a regex wildcard during entity replacement, allowing an attacker to shadow...

CVE-2026-25896

CVE-2026-25896 affects the Node.js XML parser fast-xml-parser. From 4.1.3 up to (but not including) 5.3.5, a dot in a DOCTYPE entity name is treated as a regex wildcard during entity replacement, allowing shadowing of built-in entities and bypassing encoding, which can lead to XSS when parsed out...