Security context

What an agent needs to avoid regressing past fixes and find the next vuln in this repo.

symfony/http-foundation

              8.2 @ d84c89f
            

Fixes

CVEs

HIGH

Peak severity

Highlights

SSRF: 3 prior fixes. Scrutinize any change in this area.

Request.php: most-fixed (2 issues). Treat as high-risk during review.

3 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.

SSRF: Incomplete private network blocklists (such as missing RFC6598 Shared Address Space or IPv6 transition-form prefixes) allow attackers to bypass SSRF protection mechanisms in clients relying on IpUtils.

Auth Bypass: Discrepancies in URI parsing (such as improper host validation, parsing of colons in path segments, or incorrect PATH_INFO interpretation) can allow attackers to bypass security boundaries, spoof hosts, or circumvent routing rules.

HTTP Request Smuggling: Failure to reject invalid or control characters (such as CR, LF, TAB, or backslashes) in incoming request URIs can lead to parsing discrepancies between the framework and upstream reverse proxies, enabling HTTP request smuggling.