CVEvulnerability

CVE-2026-26278

7.5 HIGH Published 2026-02-19 Modified 2026-09-10 Official page ↗
Status
Modified
Published
2026-02-19
Last modified
2026-09-10
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-776

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 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 to make the parser spend seconds or even minutes processing a single request, effectively freezing the application. Version 5.3.6 fixes the issue. As a workaround, avoid using DOCTYPE parsing by `processEntities: false` option.

Affected configurations

• naturalintelligence fast-xml-parser (>= 4.1.3 < 5.3.6)

Related

Weakness · CWE (1)

  • CWE-776 Improper Restriction of Recursive Entity References in DTDs weakness

References