fast-xml-parser vulnerable to Regex Injection via Doctype Entities

Description

“fast-xml-parser” allows special characters in entity names, which are not escaped or sanitized. Since the entity name is used for creating a regex for searching and replacing entities in the XML body, an attacker can abuse it for DoS attacks.

Recommendation

Update the fast-xml-parser package to the latest compatible version. Followings are version details:

• Affected version(s): >= 4.1.3, < 4.2.4
• Patched version(s): 4.2.4

References

• GHSA-6w63-h3fj-q4vw
• CVE-2023-34104
• CWE-1333
• CAPEC-310
• OWASP 2021-A6

Related Issues

• fast-xml-parser vulnerable to Prototype Pollution through tag or attribute name - CVE-2023-26920
• fast-xml-parser vulnerable to ReDOS at currency parsing - CVE-2024-41818
• fast-xml-parser has RangeError DoS Numeric Entities Bug - CVE-2026-25128
• fast-xml-parser regex vulnerability patch could be improved from a safety perspective - Vulnerability

Tags:

npm

fast-xml-parser