fast-xml-parser: Repeated DOCTYPE declarations reset entity expansion limits

Date Jul 21, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product npm · fast-xml-parser
High-risk advisory

Summary

fast-xml-parser: Repeated DOCTYPE declarations reset entity expansion limits

Why it matters

GitHub has published a reviewed security advisory for fast-xml-parser. Prioritize it with other application dependency updates.

Operator check

Check whether fast-xml-parser is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 8.7.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.