Highlights
SSRF: 2 prior fixes. Scrutinize any change in this area.
AbstractUrl.php: most-fixed (1 issue). Treat as high-risk during review.
1 high-severity fix in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
SSRF: A bypass in the URL sanitization logic existed due to a brittle character-index check rather than a robust substring prefix check, allowing attackers to supply malformed URLs that bypass security filters to trigger SSRF.
SSRF: A validation error in the URI Scheme parser's regex allowed commas to be treated as valid characters, potentially causing downstream parsers or HTTP clients to misinterpret the scheme and connect to unintended destinations.