Highlights
XXE: 2 prior fixes. Scrutinize any change in this area.
XMLUtil.java: most-fixed (2 issues). Treat as high-risk during review.
2 high-severity fixes in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
XXE: Both historical fixes target XXE in the same component, indicating a persistent risk of misconfigured JAXP parsing. The first fix added entity resolution and secure processing; the second added explicit denial of external DTD/schema and XInclude, showing that initial hardening was incomplete.