CVE-2026-25128— fast-xml-parser has RangeError DoS Numeric Entities Bug
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-25128
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
fast-xml-parser has RangeError DoS Numeric Entities Bug
Source: NVD (National Vulnerability Database)
Vulnerability Description
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 5.0.9 through 5.3.3, a RangeError vulnerability exists in the numeric entity processing of fast-xml-parser when parsing XML with out-of-range entity code points (e.g., `�` or `�`). This causes the parser to throw an uncaught exception, crashing any application that processes untrusted XML input. Version 5.3.4 fixes the issue.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
fast-xml-parser 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
fast-xml-parser是Natural Intelligence开源的一个库。用于在没有基于 C/C++ 的库和回调的情况下，快速验证 XML、解析 XML 和构建 XML。 fast-xml-parser 4.3.6版本至5.3.3版本存在安全漏洞，该漏洞源于处理超出范围的数字实体时存在缺陷，可能导致应用程序崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| NaturalIntelligence | fast-xml-parser | >= 5.0.9, <= 5.3.3 | - |
II. Public POCs for CVE-2026-25128
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-25128
请登录查看更多情报信息。
IV. Related Vulnerabilities
Same product: fast-xml-parser
- CVE-2026-41650
fast-xml-parser XMLBuilder: XML Comment and CDATA Injection - CVE-2026-33349
fast-xml-parser: Entity Expansion Limits Bypassed When Set t - CVE-2026-33036
fast-xml-parser affected by numeric entity expansion bypassi - CVE-2026-27942
fast-xml-parser has stack overflow in XMLBuilder with preser - CVE-2026-25896
fast-xml-parser has an entity encoding bypass via regex inje
Same vendor: NaturalIntelligence
- CVE-2026-41650
fast-xml-parser XMLBuilder: XML Comment and CDATA Injection - CVE-2026-33349
fast-xml-parser: Entity Expansion Limits Bypassed When Set t - CVE-2026-33036
fast-xml-parser affected by numeric entity expansion bypassi - CVE-2026-27942
fast-xml-parser has stack overflow in XMLBuilder with preser - CVE-2026-25896
fast-xml-parser has an entity encoding bypass via regex inje
Same weakness: CWE-20
V. Comments for CVE-2026-25128
No comments yet